subject:( Hot rolling)

Uppsala University

1. Sunde, Mikael. Cloud Optimization for Hot Rolling.

Degree: Division of Scientific Computing, 2014, Uppsala University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-233450

► Cloud computation is an emerging technology where a user can make use of remote computational resources of a service provider instead of using local… (more)

Subjects/Keywords: optimization; cloud computing; hot rolling

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APA (6^th Edition):

Sunde, M. (2014). Cloud Optimization for Hot Rolling. (Thesis). Uppsala University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-233450

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sunde, Mikael. “Cloud Optimization for Hot Rolling.” 2014. Thesis, Uppsala University. Accessed February 21, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-233450.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sunde, Mikael. “Cloud Optimization for Hot Rolling.” 2014. Web. 21 Feb 2019.

Vancouver:

Sunde M. Cloud Optimization for Hot Rolling. [Internet] [Thesis]. Uppsala University; 2014. [cited 2019 Feb 21]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-233450.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sunde M. Cloud Optimization for Hot Rolling. [Thesis]. Uppsala University; 2014. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-233450

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Manchester

2. Hill, Thomas. Evolution of second phase particles with deformation in aluminium alloys.

Degree: PhD, 2015, University of Manchester

URL: https://www.research.manchester.ac.uk/portal/en/theses/evolution-of-second-phase-particles-with-deformation-in-aluminium-alloys(e87af2eb-bf04-46d5-9b51-d44d4584c579).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.727833

► The effect of high temperature, high strain rate deformation on the evolution of second phase particles in commercial aluminium alloys has been investigated. Three model… (more)

Subjects/Keywords: Evolution; Particles; Hot Rolling; Dispersoids; Aluminium; Deformation

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APA (6^th Edition):

Hill, T. (2015). Evolution of second phase particles with deformation in aluminium alloys. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/evolution-of-second-phase-particles-with-deformation-in-aluminium-alloys(e87af2eb-bf04-46d5-9b51-d44d4584c579).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.727833

Chicago Manual of Style (16^th Edition):

Hill, Thomas. “Evolution of second phase particles with deformation in aluminium alloys.” 2015. Doctoral Dissertation, University of Manchester. Accessed February 21, 2019. https://www.research.manchester.ac.uk/portal/en/theses/evolution-of-second-phase-particles-with-deformation-in-aluminium-alloys(e87af2eb-bf04-46d5-9b51-d44d4584c579).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.727833.

MLA Handbook (7^th Edition):

Hill, Thomas. “Evolution of second phase particles with deformation in aluminium alloys.” 2015. Web. 21 Feb 2019.

Vancouver:

Hill T. Evolution of second phase particles with deformation in aluminium alloys. [Internet] [Doctoral dissertation]. University of Manchester; 2015. [cited 2019 Feb 21]. Available from: https://www.research.manchester.ac.uk/portal/en/theses/evolution-of-second-phase-particles-with-deformation-in-aluminium-alloys(e87af2eb-bf04-46d5-9b51-d44d4584c579).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.727833.

Council of Science Editors:

Hill T. Evolution of second phase particles with deformation in aluminium alloys. [Doctoral Dissertation]. University of Manchester; 2015. Available from: https://www.research.manchester.ac.uk/portal/en/theses/evolution-of-second-phase-particles-with-deformation-in-aluminium-alloys(e87af2eb-bf04-46d5-9b51-d44d4584c579).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.727833

University of Manchester

3. Hill, Thomas. Evolution of second phase particles with deformation in aluminium alloys.

Degree: 2015, University of Manchester

URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:271136

►

The effect of high temperature, high strain rate deformation on the evolution of second phase particles in commercial aluminium alloys has been investigated. Three model… (more)

Subjects/Keywords: Aluminium; Dispersoids; Deformation; Hot Rolling; Particles; Evolution

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Hill, T. (2015). Evolution of second phase particles with deformation in aluminium alloys. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:271136

Chicago Manual of Style (16^th Edition):

Hill, Thomas. “Evolution of second phase particles with deformation in aluminium alloys.” 2015. Doctoral Dissertation, University of Manchester. Accessed February 21, 2019. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:271136.

MLA Handbook (7^th Edition):

Hill, Thomas. “Evolution of second phase particles with deformation in aluminium alloys.” 2015. Web. 21 Feb 2019.

Vancouver:

Hill T. Evolution of second phase particles with deformation in aluminium alloys. [Internet] [Doctoral dissertation]. University of Manchester; 2015. [cited 2019 Feb 21]. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:271136.

Council of Science Editors:

Hill T. Evolution of second phase particles with deformation in aluminium alloys. [Doctoral Dissertation]. University of Manchester; 2015. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:271136

McMaster University

4. Meyer, Kevin Christopher. A Multi-Level Algorithm for Production Scheduling and Sequencing Optimization in Hot Rolling Steel Mills.

Degree: MASc, 2017, McMaster University

URL: http://hdl.handle.net/11375/21473

►

The objective of the hot rolling mill is to transform slabs of steel into thin strips which conform to specific dimensional and metallurgical customer requirements.… (more)

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The objective of the hot rolling mill is to transform slabs of steel into thin strips which conform to specific dimensional and metallurgical customer requirements. High performance and flexibility in the operation is required due to strict customer demands, variable market conditions, and the drive for continuous improvement. Historically human schedulers have performed the scheduling and sequencing tasks, however it is not a reasonable expectation that they consider all the complex objectives required in optimal production of a hot mill. Therefore, there are significant opportunities for improvement in this area through the application of mathematical optimization models and solution algorithms. This work presents a set of models and a solution algorithm for optimal scheduling and sequencing of production within a hot rolling steel mill. The models and algorithms presented within this thesis are specifically developed for ArcelorMittal Dofasco’s Hot Strip Mill in Hamilton, Ontario, Canada. First, a graph theoretic representation of the production block is developed along with an asymmetric travelling salesman formulation of the sequencing problem. A slab transition cost function comprised of the hot rolling process objectives is formalized. The objective of the optimization is to generate a complete block sequence which minimizes the cost of transitions between slabs thus minimizing the overall cost of production. The Concorde exact solver is leveraged for the sequencing problem. Second, the scheduling of slabs from inventory into blocks is considered in addition to sequencing. A methodology for slab clustering is defined. The novel concept of width-groups is developed and a heuristic algorithm is devised to calculate an objective for the MILP slab scheduling model. The objective of the scheduling optimization is to construct a set of blocks which minimize deviation from the calculated width-group design. A revised sequencing model, updated to reflect the relaxations enabled by the width-group design, is formulated. Industrial production and offline trials show that the proposed scheduling-sequencing framework outperforms the human scheduler in all critical performance metrics for both scheduling and sequencing. A conservative estimate of the reoccurring monetary benefits available from use of the proposed scheduling-sequencing optimization framework is greater than $1.2M CAD per year.

Thesis

Master of Applied Science (MASc)

Advisors/Committee Members: Mahalec, Vladimir, Chemical Engineering.

Subjects/Keywords: Scheduling; Steel; Optimization; Hot Rolling; Sequencing

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Meyer, K. C. (2017). A Multi-Level Algorithm for Production Scheduling and Sequencing Optimization in Hot Rolling Steel Mills. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/21473

Chicago Manual of Style (16^th Edition):

Meyer, Kevin Christopher. “A Multi-Level Algorithm for Production Scheduling and Sequencing Optimization in Hot Rolling Steel Mills.” 2017. Masters Thesis, McMaster University. Accessed February 21, 2019. http://hdl.handle.net/11375/21473.

MLA Handbook (7^th Edition):

Meyer, Kevin Christopher. “A Multi-Level Algorithm for Production Scheduling and Sequencing Optimization in Hot Rolling Steel Mills.” 2017. Web. 21 Feb 2019.

Vancouver:

Meyer KC. A Multi-Level Algorithm for Production Scheduling and Sequencing Optimization in Hot Rolling Steel Mills. [Internet] [Masters thesis]. McMaster University; 2017. [cited 2019 Feb 21]. Available from: http://hdl.handle.net/11375/21473.

Council of Science Editors:

Meyer KC. A Multi-Level Algorithm for Production Scheduling and Sequencing Optimization in Hot Rolling Steel Mills. [Masters Thesis]. McMaster University; 2017. Available from: http://hdl.handle.net/11375/21473

Brno University of Technology

5. Sigmund, Lukáš. Výroba válcovaného profilu a její ověření pomocí numerické simulace .

Degree: 2018, Brno University of Technology

URL: http://hdl.handle.net/11012/83186

► Práce se zabývá technologií výroby profilů válcováním za tepla, přičemž předkládá kompletní souhrn podmínek a principů tohoto procesu. Dále je popsán systém návrhu kalibrace řešeného… (more)

Subjects/Keywords: válcování za tepla; profil; podmínky válcování; kalibry; simulace; hot rolling; profile; rolling conditions; calibres; simulation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sigmund, L. (2018). Výroba válcovaného profilu a její ověření pomocí numerické simulace . (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/83186

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sigmund, Lukáš. “Výroba válcovaného profilu a její ověření pomocí numerické simulace .” 2018. Thesis, Brno University of Technology. Accessed February 21, 2019. http://hdl.handle.net/11012/83186.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sigmund, Lukáš. “Výroba válcovaného profilu a její ověření pomocí numerické simulace .” 2018. Web. 21 Feb 2019.

Vancouver:

Sigmund L. Výroba válcovaného profilu a její ověření pomocí numerické simulace . [Internet] [Thesis]. Brno University of Technology; 2018. [cited 2019 Feb 21]. Available from: http://hdl.handle.net/11012/83186.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sigmund L. Výroba válcovaného profilu a její ověření pomocí numerické simulace . [Thesis]. Brno University of Technology; 2018. Available from: http://hdl.handle.net/11012/83186

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

KTH

6. Björn, Linnéa. Investigation of Hot Ductility Gradients in Duplex Stainless Steel in the Beginning of the Continuous Casting Proces.

Degree: Materials Science and Engineering, 2014, KTH

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-160892

►

The steel quality is deteriorated at a continuous casting start. Therefore, material from the first cast slab is cut off and re-melted in the… (more)

▼

The steel quality is deteriorated at a continuous casting start. Therefore, material from the first cast slab is cut off and re-melted in the melt shop. If too little is discarded, the inferior quality in the retained length can cause defects like edge cracks during subsequent hot rolling. This means that manufacturing resources are wasted on processing inferior material which has to be re-melted anyways at a later stage. On the other hand, if an excessive length of the first slab is re-melted, good material is wasted. In either case, optimizing the length of the start-scrap material is both economically and environmentally beneficial. Edge cracks are more common in the beginning of the first slab, even though a part is cut off. It is likely that the edge cracks arise due to reduced hot ductility in the first cast material. The purpose of this project is to optimize where the cut should be made in order to achieve the best yield. The hot ductility was investigated by performing hot tensile- and bending tests. The hot tensile tests indicate high hot ductility for the investigated specimens. The area reduction, which is correlated to the hot ductility, is above 70 % for all the investigated specimens. When considering the average area reduction while neglecting possible differences between the heats, the specimens from one meter tend to have a lower hot ductility compared to the other specimens. However, the differences are small. No difference can be seen between edge and middle specimens when only looking at the tensile tests. The bending tests did not crack without notches, even though the maximum load and a test temperature of 750 °C was used. That strongly indicates high hot ductility as well. By using notches, the bending tests cracked and it was shown that edge specimens and specimens from one meter cracked the most. No edge cracks were found, after hot rolling, on the first cast slabs from the investigated heats.

Vid en stränggjutstart är kvalitén på första slaben sämre. På grund av detta så skärs en bit, av det först gjutna slabet av och smälts om i stålverket. Om för lite material kapas av kan det leda till defekter, såsom kantbrakor, under den efterföljande varmvalsningen. Detta innebär att resurser används i onödan för att tillverka material av otillräcklig kvalitet som sedan ändå måste smältas om i ett senare steg. Skärs istället för mycket material bort så smälts prima material om i onödan. Att optimera startskrotlängden är följaktligen positivt både för miljön och rent ekonomiskt. Under varmvalsningen kan defekten kantbrakor, det vill säga sprickor vid kanterna, uppstå. Trots att en bit av det första gjutna slabet skärs av, så är det första slabet fortfarande mest utsatt för kantbrakor. Detta tros bero på nedsatt varmduktilitet i det första gjutna materialet. Syftet med detta projekt är att optimera längden på startskrotet för att spara så mycket användbart material som möjligt. Varmduktiliteten undersöktes genom drag- och bockprovning. Dragproven indikerar hög varmduktilitet för…

Subjects/Keywords: Continuous casting; start-cast; hot rolling; hot ductility; duplex stainless steel; edge cracks

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Björn, L. (2014). Investigation of Hot Ductility Gradients in Duplex Stainless Steel in the Beginning of the Continuous Casting Proces. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-160892

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Björn, Linnéa. “Investigation of Hot Ductility Gradients in Duplex Stainless Steel in the Beginning of the Continuous Casting Proces.” 2014. Thesis, KTH. Accessed February 21, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-160892.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Björn, Linnéa. “Investigation of Hot Ductility Gradients in Duplex Stainless Steel in the Beginning of the Continuous Casting Proces.” 2014. Web. 21 Feb 2019.

Vancouver:

Björn L. Investigation of Hot Ductility Gradients in Duplex Stainless Steel in the Beginning of the Continuous Casting Proces. [Internet] [Thesis]. KTH; 2014. [cited 2019 Feb 21]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-160892.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Björn L. Investigation of Hot Ductility Gradients in Duplex Stainless Steel in the Beginning of the Continuous Casting Proces. [Thesis]. KTH; 2014. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-160892

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

7. Yousaf, Naeem. Calucaltion of waste heat from hot rolled steel coils at SSAB and its recovery.

Degree: Mechanical Engineering, 2009, Dalarna University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:du-4516

► Hot rolling process is heat input process. The heat energy in hot rolled steel coils can be utilized. At SSAB Strip Product Borlänge when… (more)

Subjects/Keywords: Hot rolling process; Hot rolled steel coils; Heat dissipation rate; Water basin

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APA (6^th Edition):

Yousaf, N. (2009). Calucaltion of waste heat from hot rolled steel coils at SSAB and its recovery. (Thesis). Dalarna University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:du-4516

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Yousaf, Naeem. “Calucaltion of waste heat from hot rolled steel coils at SSAB and its recovery.” 2009. Thesis, Dalarna University. Accessed February 21, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:du-4516.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Yousaf, Naeem. “Calucaltion of waste heat from hot rolled steel coils at SSAB and its recovery.” 2009. Web. 21 Feb 2019.

Vancouver:

Yousaf N. Calucaltion of waste heat from hot rolled steel coils at SSAB and its recovery. [Internet] [Thesis]. Dalarna University; 2009. [cited 2019 Feb 21]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:du-4516.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Yousaf N. Calucaltion of waste heat from hot rolled steel coils at SSAB and its recovery. [Thesis]. Dalarna University; 2009. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:du-4516

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Wollongong

8. Zhu, Qiang. A study of oxidation and wear on high speed steel roll material.

Degree: PhD, 2012, University of Wollongong

URL: 0913 MECHANICAL ENGINEERING ; http://ro.uow.edu.au/theses/3610

► The oxidation of high speed steel roll material has been investigated using a high temperature microscope with a CCD camera as a detector, in… (more)

▼ The oxidation of high speed steel roll material has been investigated using a high temperature microscope with a CCD camera as a detector, in temperatures ranging from 500 to 700 ^oC, in both dry and humid atmospheres (up to 12.5% H₂O). The whole oxidation process was observed in-situ and recorded. In-situ observations indicate that oxide scales from high speed steel first nucleate at the carbides/matrix interfaces, then spread rapidly outward to cover the vanadium rich MC carbides, followed by a continuous growth over the whole surface. The surface morphology of the oxidised high speed steel is not homogenous due to severe selective oxidation. The temperature at which oxidation commences has a significant influence on the oxidation behaviour of the material because as the temperature increases, the rate of oxidation increases dramatically. The sample surface was oxidised far more severely at 700 ^oC than at 650 ^oC in both a dry and humid atmosphere. These results indicate that water vapour in the atmosphere greatly enhances the oxidation of high speed steel, as well as having a significant influence on the morphology of the oxidised surface. Water vapour in the reacting atmosphere reduces the grain size and increases the porosity of the iron oxide. Different types of carbides in the material show large differences in their resistance to oxidation, for example, chromium rich M₇C₃ carbides strongly resist oxidation while vanadium rich MC carbides oxidise much easier. A TEM investigation of oxide scale formed on the HSS sample indicates that it consists of two sub-layers: a fine grained (Fe,Cr)-rich oxides inner layer and a larger columnar Fe oxide outer layer. Oxidation tests under a high humidity (46.5% H₂O) atmosphere were carried out in the Gleeble 3500 thermal mechanical simulator. The results show that the water content in the atmosphere not only increases the oxidation rate of high speed steel, but it also influences the microstructure and morphology of the oxide scale. The formed oxide scale is non-uniform and more porous and fractured than the compact, uniform layer formed with dry air. With an increasing content of water vapour, more porous oxide scales form and more Fe₂O₃ phase is formed in the oxide scale. Nano-indentation tests were used to characterise the mechanical properties of the oxide scale formed on the HSS sample. A nano-indentation was performed on the cross section of the oxide scale with a matrix (5 by 5 and/or 7 by 7) routine. The tests successfully revealed the different mechanical properties of the inner and outer sub-layer. The results indicate that the outer layer with larger columnar Fe oxides was the hardest (13-16GPa), followed by the inner sub-layer (9-11GPa) with fine grained (Fe,Cr) rich oxides, and then the HSS matrix (approximate 9GPa). The HSS matrix had the highest Young’s modulus, around 270GPa, the outer oxide layer was 200-240GPa, and the inner oxide layer was the…

Subjects/Keywords: oxidation; high speed steel; hot rolling; oxide scale; nano-indentation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zhu, Q. (2012). A study of oxidation and wear on high speed steel roll material. (Doctoral Dissertation). University of Wollongong. Retrieved from 0913 MECHANICAL ENGINEERING ; http://ro.uow.edu.au/theses/3610

Chicago Manual of Style (16^th Edition):

Zhu, Qiang. “A study of oxidation and wear on high speed steel roll material.” 2012. Doctoral Dissertation, University of Wollongong. Accessed February 21, 2019. 0913 MECHANICAL ENGINEERING ; http://ro.uow.edu.au/theses/3610.

MLA Handbook (7^th Edition):

Zhu, Qiang. “A study of oxidation and wear on high speed steel roll material.” 2012. Web. 21 Feb 2019.

Vancouver:

Zhu Q. A study of oxidation and wear on high speed steel roll material. [Internet] [Doctoral dissertation]. University of Wollongong; 2012. [cited 2019 Feb 21]. Available from: 0913 MECHANICAL ENGINEERING ; http://ro.uow.edu.au/theses/3610.

Council of Science Editors:

Zhu Q. A study of oxidation and wear on high speed steel roll material. [Doctoral Dissertation]. University of Wollongong; 2012. Available from: 0913 MECHANICAL ENGINEERING ; http://ro.uow.edu.au/theses/3610

University of Windsor

9. Zhao, Qi. Effect of Roll Material on Surface Quality of Rolled Aluminum.

Degree: MA, Mechanical, Automotive, and Materials Engineering, 2014, University of Windsor

URL: http://scholar.uwindsor.ca/etd/5080

► The surface defects of aluminum alloys that have undergone hot rolling were studied. The effects of different roll materials, of the number of rolling passes… (more)

Subjects/Keywords: aluminum; carbides; hot rolling; roll material; Engineering; Materials Science and Engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zhao, Q. (2014). Effect of Roll Material on Surface Quality of Rolled Aluminum. (Masters Thesis). University of Windsor. Retrieved from http://scholar.uwindsor.ca/etd/5080

Chicago Manual of Style (16^th Edition):

Zhao, Qi. “Effect of Roll Material on Surface Quality of Rolled Aluminum.” 2014. Masters Thesis, University of Windsor. Accessed February 21, 2019. http://scholar.uwindsor.ca/etd/5080.

MLA Handbook (7^th Edition):

Zhao, Qi. “Effect of Roll Material on Surface Quality of Rolled Aluminum.” 2014. Web. 21 Feb 2019.

Vancouver:

Zhao Q. Effect of Roll Material on Surface Quality of Rolled Aluminum. [Internet] [Masters thesis]. University of Windsor; 2014. [cited 2019 Feb 21]. Available from: http://scholar.uwindsor.ca/etd/5080.

Council of Science Editors:

Zhao Q. Effect of Roll Material on Surface Quality of Rolled Aluminum. [Masters Thesis]. University of Windsor; 2014. Available from: http://scholar.uwindsor.ca/etd/5080

NSYSU

10. Chen, Hysuan-han. Study of Hot Rolling of Magnesium Alloy AZ31.

Degree: Master, Mechanical and Electro-Mechanical Engineering, 2014, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0718114-110137

► Magnesium alloy products have not only been applied to electronic information and 3C industries products, but also applied to automobiles, airplanes and rail car bodies.… (more)

Subjects/Keywords: Hot rolling process; Magnesium alloy sheet; Finite element analysis; Microstructure

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Chen, H. (2014). Study of Hot Rolling of Magnesium Alloy AZ31. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0718114-110137

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chen, Hysuan-han. “Study of Hot Rolling of Magnesium Alloy AZ31.” 2014. Thesis, NSYSU. Accessed February 21, 2019. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0718114-110137.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chen, Hysuan-han. “Study of Hot Rolling of Magnesium Alloy AZ31.” 2014. Web. 21 Feb 2019.

Vancouver:

Chen H. Study of Hot Rolling of Magnesium Alloy AZ31. [Internet] [Thesis]. NSYSU; 2014. [cited 2019 Feb 21]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0718114-110137.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chen H. Study of Hot Rolling of Magnesium Alloy AZ31. [Thesis]. NSYSU; 2014. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0718114-110137

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU

11. Lin, Yi-wen. Effect of annealing temperature and time on microstructure and tensile properties of a hot-rolled medium Mn steel.

Degree: Master, Materials and Optoelectronic Science, 2016, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0703116-152931

► This study explores the effect of annealing temperature and time on microstructure and tensile properties of a hot-rolled medium Mn steel after two-stage annealing procedures.… (more)

Subjects/Keywords: AHSS; Hot rolling; Tensile properties; Annealing temperature; Annealing time

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lin, Y. (2016). Effect of annealing temperature and time on microstructure and tensile properties of a hot-rolled medium Mn steel. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0703116-152931

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lin, Yi-wen. “Effect of annealing temperature and time on microstructure and tensile properties of a hot-rolled medium Mn steel.” 2016. Thesis, NSYSU. Accessed February 21, 2019. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0703116-152931.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lin, Yi-wen. “Effect of annealing temperature and time on microstructure and tensile properties of a hot-rolled medium Mn steel.” 2016. Web. 21 Feb 2019.

Vancouver:

Lin Y. Effect of annealing temperature and time on microstructure and tensile properties of a hot-rolled medium Mn steel. [Internet] [Thesis]. NSYSU; 2016. [cited 2019 Feb 21]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0703116-152931.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lin Y. Effect of annealing temperature and time on microstructure and tensile properties of a hot-rolled medium Mn steel. [Thesis]. NSYSU; 2016. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0703116-152931

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade do Rio Grande do Sul

12. Bombana, Lucas Tadeu Amarante. Influência da qualidade e tipo de esmerilhamento de tarugos na geração de defeitos superficias de barras laminadas.

Degree: 2012, Universidade do Rio Grande do Sul

URL: http://hdl.handle.net/10183/70682

►

Este trabalho avalia a influência do método e qualidade do esmerilhamento de tarugos na qualidade superficial de barras redondas de aço laminadas. Foi avaliada a… (more)

Subjects/Keywords: Steel; Laminação a quente; Aço; Surface quality; Hot rolling; Billet grinding

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Bombana, L. T. A. (2012). Influência da qualidade e tipo de esmerilhamento de tarugos na geração de defeitos superficias de barras laminadas. (Thesis). Universidade do Rio Grande do Sul. Retrieved from http://hdl.handle.net/10183/70682

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Bombana, Lucas Tadeu Amarante. “Influência da qualidade e tipo de esmerilhamento de tarugos na geração de defeitos superficias de barras laminadas.” 2012. Thesis, Universidade do Rio Grande do Sul. Accessed February 21, 2019. http://hdl.handle.net/10183/70682.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Bombana, Lucas Tadeu Amarante. “Influência da qualidade e tipo de esmerilhamento de tarugos na geração de defeitos superficias de barras laminadas.” 2012. Web. 21 Feb 2019.

Vancouver:

Bombana LTA. Influência da qualidade e tipo de esmerilhamento de tarugos na geração de defeitos superficias de barras laminadas. [Internet] [Thesis]. Universidade do Rio Grande do Sul; 2012. [cited 2019 Feb 21]. Available from: http://hdl.handle.net/10183/70682.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bombana LTA. Influência da qualidade e tipo de esmerilhamento de tarugos na geração de defeitos superficias de barras laminadas. [Thesis]. Universidade do Rio Grande do Sul; 2012. Available from: http://hdl.handle.net/10183/70682

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU

13. Wang, Yung-Lin. Investigation of Grain Size Prediction and Mechanical Properties in Multi-pass Hot Rolling of Magnesium Alloy ZK60 Sheets.

Degree: Master, Mechanical and Electro-Mechanical Engineering, 2018, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0003118-143859

► Magnesium alloys have been widely used in the automotive industry, bicycle frame, aerospace development and electronic information 3C products and so on. It is an… (more)

Subjects/Keywords: microstructure; grain size; dynamic recrystallization; recrystallization prediction; Multi-pass hot rolling

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APA (6^th Edition):

Wang, Y. (2018). Investigation of Grain Size Prediction and Mechanical Properties in Multi-pass Hot Rolling of Magnesium Alloy ZK60 Sheets. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0003118-143859

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wang, Yung-Lin. “Investigation of Grain Size Prediction and Mechanical Properties in Multi-pass Hot Rolling of Magnesium Alloy ZK60 Sheets.” 2018. Thesis, NSYSU. Accessed February 21, 2019. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0003118-143859.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wang, Yung-Lin. “Investigation of Grain Size Prediction and Mechanical Properties in Multi-pass Hot Rolling of Magnesium Alloy ZK60 Sheets.” 2018. Web. 21 Feb 2019.

Vancouver:

Wang Y. Investigation of Grain Size Prediction and Mechanical Properties in Multi-pass Hot Rolling of Magnesium Alloy ZK60 Sheets. [Internet] [Thesis]. NSYSU; 2018. [cited 2019 Feb 21]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0003118-143859.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wang Y. Investigation of Grain Size Prediction and Mechanical Properties in Multi-pass Hot Rolling of Magnesium Alloy ZK60 Sheets. [Thesis]. NSYSU; 2018. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0003118-143859

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

14. 蛭田, 敏樹. 熱間・冷間圧延における鋼板の板端部変形制御に関する研究.

Degree: 博士（工学）, 2017, Kyushu Institute of Technology / 九州工業大学

URL: http://hdl.handle.net/10228/5280

九州工業大学博士学位論文学位記番号:工博甲第355号　学位授与年月日:平成25年9月27日

平成25年度

Advisors/Committee Members: 恵良, 秀則.

Subjects/Keywords: Steel hot rolling; Edeg deformation; FEM analysis; Steel yeild

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APA (6^th Edition):

蛭田, �. (2017). 熱間・冷間圧延における鋼板の板端部変形制御に関する研究. (Thesis). Kyushu Institute of Technology / 九州工業大学. Retrieved from http://hdl.handle.net/10228/5280

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

蛭田, 敏樹. “熱間・冷間圧延における鋼板の板端部変形制御に関する研究.” 2017. Thesis, Kyushu Institute of Technology / 九州工業大学. Accessed February 21, 2019. http://hdl.handle.net/10228/5280.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

蛭田, 敏樹. “熱間・冷間圧延における鋼板の板端部変形制御に関する研究.” 2017. Web. 21 Feb 2019.

Vancouver:

蛭田 �. 熱間・冷間圧延における鋼板の板端部変形制御に関する研究. [Internet] [Thesis]. Kyushu Institute of Technology / 九州工業大学; 2017. [cited 2019 Feb 21]. Available from: http://hdl.handle.net/10228/5280.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

蛭田 �. 熱間・冷間圧延における鋼板の板端部変形制御に関する研究. [Thesis]. Kyushu Institute of Technology / 九州工業大学; 2017. Available from: http://hdl.handle.net/10228/5280

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Georgia Tech

15. Dave, Tanvi. Effect of hot rolling and intermittent annealing on the texture evolution of monotectoid BCC Zr-Nb.

Degree: MS, Materials Science and Engineering, 2017, Georgia Tech

URL: http://hdl.handle.net/1853/59294

► In the case of illicit trafficking of nuclear materials or interdicting nuclear debris, it is necessary to have the capabilities to intercept, collect, and analyze… (more)

▼ In the case of illicit trafficking of nuclear materials or interdicting nuclear debris, it is necessary to have the capabilities to intercept, collect, and analyze the nuclear material and determine its origin in a timely fashion. Nuclear forensics aims to determine robust and predictive signatures of nuclear materials in order to determine the origin of the material. Isotopic signatures, microstructure morphology, and chemical composition all contribute to identification of the material and its origin. The data that is collected is then compared to empirical data from various databases or is computationally interpolated from existing models of tested material systems. The incorporation of material science in nuclear forensics allows for the analysis of microstructure-processing relationships of interdicted materials in order to determine the material’s provenance. The processing steps of actinide alloys can introduce discriminating microstructural elements such as phase or morphological changes which can act as signatures that connect the microstructure to its process path. Texture analysis of a material at each stage in its process path may provide distinct signatures which can be input into an inverse processing model and reverse engineer a fabrication process for a given final microstructure. In this work, the first step is taken towards predicting a material’s processing history by understanding the structure-processing relationship of an actinide alloy surrogate material as it undergoes thermo-mechanical processing. The chosen system for this study was the Zr-18wt% Nb which has applications in the nuclear industry and is a suitable surrogate for U-6wt% Nb. The as-received Zr-18wt% Nb alloy was β-quenched to retain the high temperature BCC phase during subsequent processing. The sample was hot rolled to height reductions of 10%, 20%, 30% and 40% and intermittently annealed. The microstructure evolution was captured by characterizing each stage of this process path using optical microscopy, X-ray diffraction (XRD), and electron back scattered diffraction (EBSD). The texture and microtexture of the β-phase Zr-Nb alloy is analyzed by calculating the orientation distribution functions (ODF) and discussed in terms of the rolling and recrystallization textures of BCC metals and alloys. The typical rolling and recrystallization textures are well understood for BCC materials that undergo such processing over one pass however the overarching effect on final texture of a material that is repeatedly rolled and annealed has been less frequently studied. Changes in the initial texture of the Zr-18wt% Nb alloy as it undergoes each hot-rolling and annealing step leads to unconventional patterns of texture evolution as sample reduction is increased. This work aims to report and explain how such patterns may arise and how these patterns differ when comparing texture to microtexture. Advisors/Committee Members: Garmestani, Hamid (advisor), Deo, Chaitanya (advisor), Singh, Preet (advisor).

Subjects/Keywords: Texture evolution; Zr-Nb alloy; Texture; Hot rolling; EBSD; XRD

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APA (6^th Edition):

Dave, T. (2017). Effect of hot rolling and intermittent annealing on the texture evolution of monotectoid BCC Zr-Nb. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/59294

Chicago Manual of Style (16^th Edition):

Dave, Tanvi. “Effect of hot rolling and intermittent annealing on the texture evolution of monotectoid BCC Zr-Nb.” 2017. Masters Thesis, Georgia Tech. Accessed February 21, 2019. http://hdl.handle.net/1853/59294.

MLA Handbook (7^th Edition):

Dave, Tanvi. “Effect of hot rolling and intermittent annealing on the texture evolution of monotectoid BCC Zr-Nb.” 2017. Web. 21 Feb 2019.

Vancouver:

Dave T. Effect of hot rolling and intermittent annealing on the texture evolution of monotectoid BCC Zr-Nb. [Internet] [Masters thesis]. Georgia Tech; 2017. [cited 2019 Feb 21]. Available from: http://hdl.handle.net/1853/59294.

Council of Science Editors:

Dave T. Effect of hot rolling and intermittent annealing on the texture evolution of monotectoid BCC Zr-Nb. [Masters Thesis]. Georgia Tech; 2017. Available from: http://hdl.handle.net/1853/59294

16. Hu, Kejun. Study on Residual Stress for Hot Strip Rolling Bimetallic Rolls during the Heat Treatment Process : 圧延用複合ロールの熱処理における残留応力に関する研究.

Degree: 博士（工学）, 2018, Kyushu Institute of Technology / 九州工業大学

URL: http://hdl.handle.net/10228/00006639

► Bimetallic rolls are widely used in hot rolling mills because of excellent hardness, wear resistance and high temperature properties. During hot rolling process, thermal tensile-compressive… (more)

▼ Bimetallic rolls are widely used in hot rolling mills because of excellent hardness, wear resistance and high temperature properties. During hot rolling process, thermal tensile-compressive stresses are caused by a cyclic sequence of heating – cooling over the roll surface due to hot strip contact and water cooling, resulting in thermal crack at the roll surface. Therefore, suitable compressive stresses at the roll surface are necessary for preventing the thermal crack extension. However, the tensile residual stress always appears at the roll center to balance the surface compressive residual stress. Under the combined action of tensile thermal stress and tensile residual stress at the roll center, another form of roll fracture known as thermal barrel breakage is originating near to the roll center and breaking out to the barrel surface. Therefore, keeping optimum surface compressive residual stress and minimizing the center tensile residual stress are desirable to reduce the risk of roll fracture and improve bimetallic roll using life. Since the residual stress can be controlled by the heat treatment, thus this thesis concentrated on the residual stress analysis of bimetallic roll during the heat treatment. Chapter 1 gives the introduction of the high speed steel (HSS) bimetallic rolls used for hot strip rolling. In this chapter, the characteristics of the HSS rolls were introduced compared with the conventional single material rolls. An in addition, the development, applications and the different manufacturing methods of the HSS rolls were briefly introduced. Then the issues of the research on residual stress in the rolling rolls were reviewed. Chapter 2 analyzes the residual stress of bimetallic roll during uniform heating quenching process. A thermo-elastic-plastic finite element simulation was performed by using large amount of shell and core material properties depending on the temperature. The residual stress generation mechanism and stress distribution during the uniform heating quenching process was investigated. Then, the effects of the shell-core ratio, roll diameter, phase transformation and material heat treatment process on the residual stress are discussed. Chapter 3 analyzes the residual stress of bimetallic roll during non-uniform heating quenching process. In this chapter, the residual stress simulation was preformed including rapid heating and quenching process. The residual stresses were compared between uniform heating quenching process and non-uniform heating quenching process. The reason of the center tensile residual stress reduction in non-uniform heating quenching was investigated. Then, the usefulness of non-uniform heating quenching decreasing the roll center tensile residual stress is discussed considering the thermal stress during hot rolling process. Chapter 4 briefly describes and explains the effect of creep analysis and tempering process on residual stress reduction of bimetallic roll during uniform heating quenching and non-uniform heating quenching processes. In this chapter,… Advisors/Committee Members: 野田, 尚昭.

Subjects/Keywords: Hot rolling; Work roll; Residual stress; Heat treatment; FEM

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APA (6^th Edition):

Hu, . K. (2018). Study on Residual Stress for Hot Strip Rolling Bimetallic Rolls during the Heat Treatment Process : 圧延用複合ロールの熱処理における残留応力に関する研究. (Thesis). Kyushu Institute of Technology / 九州工業大学. Retrieved from http://hdl.handle.net/10228/00006639

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Hu, Kejun. “Study on Residual Stress for Hot Strip Rolling Bimetallic Rolls during the Heat Treatment Process : 圧延用複合ロールの熱処理における残留応力に関する研究.” 2018. Thesis, Kyushu Institute of Technology / 九州工業大学. Accessed February 21, 2019. http://hdl.handle.net/10228/00006639.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Hu, Kejun. “Study on Residual Stress for Hot Strip Rolling Bimetallic Rolls during the Heat Treatment Process : 圧延用複合ロールの熱処理における残留応力に関する研究.” 2018. Web. 21 Feb 2019.

Vancouver:

Hu K. Study on Residual Stress for Hot Strip Rolling Bimetallic Rolls during the Heat Treatment Process : 圧延用複合ロールの熱処理における残留応力に関する研究. [Internet] [Thesis]. Kyushu Institute of Technology / 九州工業大学; 2018. [cited 2019 Feb 21]. Available from: http://hdl.handle.net/10228/00006639.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hu K. Study on Residual Stress for Hot Strip Rolling Bimetallic Rolls during the Heat Treatment Process : 圧延用複合ロールの熱処理における残留応力に関する研究. [Thesis]. Kyushu Institute of Technology / 九州工業大学; 2018. Available from: http://hdl.handle.net/10228/00006639

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Wollongong

17. Yang, Shengnan. 3D coupled thermo-mechanical FE analysis of surface defects in continuous casting slab during hot rolling.

Degree: Mechanical, 2012, University of Wollongong

URL: http://ro.uow.edu.au/theses/3801

► The behaviour of the surface defects on continuously casting slabs during hot rolling is investigated by using commercial FE-code LS-DYNA3D. The objective of this… (more)

▼ The behaviour of the surface defects on continuously casting slabs during hot rolling is investigated by using commercial FE-code LS-DYNA3D. The objective of this study is to find out if surface cracks will disappear or be minimised after rolling. The material used in the simulation models is austenitic stainless steel 304, which is a commercially used material in the manufacturing industry. The coupled thermomechanical method for simulation was implemented in this study. The main surface defects studied are edge cracks, transverse cracks, V-shaped transverse cracks and longitudinal cracks. The simulation results show that it is hard for edge cracks to close after hot rolling, and the situation actually deteriorates. Edge cracks near the bottom of the slab are enlarged much more than those near the top surface of the slab. For transverse and longitudinal cracks, the two surfaces will come into contact with each other, causing the defects to be healed to some extent. Due to the closure of some of the crack area, the oxidation of these areas will be minimised. However, because of the non-uniformity of the flow stress around the cracks on the top surface of the slab, it is highly possible that it will form folder layers. The simulated models also indicate the temperature distribution for the global strip and for the crack areas. By considering contact heat transfer, convection and radiation, it is found that contact heat transfer is the dominant factor affecting the temperature difference of both the work piece and the work roll. Heat generated from the plastic deformation of the strip only accounts for a small proportion of the temperature difference and would not compensate for the heat loss through the ambient air and through the strip/roll contact. By analysing the temperature of the cracks and the slab, it is becoming possible to predict the formation of the chemical conditions which are likely to cause oxidation and defects. It is recommended that the oxidation in the crack areas could be simulated to examine its effect on the crack evolution behaviour during hot rolling process. Experiments should be carried out to compare the simulation results with the experimental ones. By investigating the microstructure of the crack behaviour it becomes possible to take effective steps to avoid crack propagation and to ensure the surface quality of the final products.

Subjects/Keywords: surface defects; continuous casting slab; thermo-mechanical analysis; hot rolling

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Yang, S. (2012). 3D coupled thermo-mechanical FE analysis of surface defects in continuous casting slab during hot rolling. (Thesis). University of Wollongong. Retrieved from http://ro.uow.edu.au/theses/3801

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Yang, Shengnan. “3D coupled thermo-mechanical FE analysis of surface defects in continuous casting slab during hot rolling.” 2012. Thesis, University of Wollongong. Accessed February 21, 2019. http://ro.uow.edu.au/theses/3801.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Yang, Shengnan. “3D coupled thermo-mechanical FE analysis of surface defects in continuous casting slab during hot rolling.” 2012. Web. 21 Feb 2019.

Vancouver:

Yang S. 3D coupled thermo-mechanical FE analysis of surface defects in continuous casting slab during hot rolling. [Internet] [Thesis]. University of Wollongong; 2012. [cited 2019 Feb 21]. Available from: http://ro.uow.edu.au/theses/3801.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Yang S. 3D coupled thermo-mechanical FE analysis of surface defects in continuous casting slab during hot rolling. [Thesis]. University of Wollongong; 2012. Available from: http://ro.uow.edu.au/theses/3801

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade do Rio Grande do Sul

18. Becker, Renata Helena Santer. Estudo da influência da taxa de resfriamento e temperatura nos últimos passes de laminação de fio máquina sobre a resposta ao tratamento térmico de esferoidização em um aço DIN 41Cr4.

Degree: 2012, Universidade do Rio Grande do Sul

URL: http://hdl.handle.net/10183/96658

►

Este trabalho visa analisar a influência das taxas de resfriamento e temperatura no último passe de laminação a quente de fio máquina de um aço… (more)

▼

Este trabalho visa analisar a influência das taxas de resfriamento e temperatura no último passe de laminação a quente de fio máquina de um aço DIN 41Cr4 sobre a microestrutura obtida após a laminação e a sua correlação com aquela resultante do tratamento térmico de esferoidização. Foi avaliado a influência da microestrutura prévia de laminação nos tempos e taxa de resfriamento do tratamento térmico necessários para garantir adequada microestrutura do aço DIN 41Cr4. Foram aplicados conceitos de laminação termomecânica através da variação dos parâmetros: temperatura no último passe de laminação (acabador) e após o último passe de laminação (formador de espiras); velocidade das esteiras do “cooling conveyor” e consequente tempo de permanência das espiras sobre a região de ventiladores e alguns parâmetros no ciclo de tratamento térmico: tempo em patamar e taxa de resfriamento durante a produção de fio máquina redondo de bitolas entre 15,88mm e 16,15mm. A avaliação da resposta às variações impostas ao processo foi realizada através de análises metalográficas de microestrutura no material laminado e no material esferoidizado (grau de esferoidização), descarbonetação e de ensaios de propriedades mecânicas como dureza e tração. A partir dos resultados buscou-se determinar a influência dos parâmetros de laminação na microestrutura do material laminado e a influência desta na resposta ao tratamento térmico de esferoidização. Foram analisadas oito diferentes condições e os resultados mostraram que maiores taxas de resfriamento resultam em microestruturas mais refinadas proporcionando uma simplificação no tratamento térmico, atendendo as propriedades desejáveis no produto final (fio máquina redondo esferoidizado).

This work aims to analyze the influence of the cooling rate, the temperature of the finishing pass and at the coil-forming during hot rolling of DIN 41Cr4 steel wire rod on the microstructure and its influence on plateau times and cooling rate during the spheroidizing heat treatment. For this study thermomechanical rolling concepts were applied through the variation of some hot rolling parameters such as: temperature at the finishing pass and at the coils-former, the cooling conveyor belts velocity and some parameters in the heat treatment cycle: soak temperature and cooling rate during the production of round wire rod with 15,88 mm and 16,15 mm diameter. The evaluation response to changes imposed on the process was evaluated by metallographic analysis of microstructure in hot rolled and spheroidized material (spheroidizing degree), hardness, decarburization and tensile test. Eight rolling conditions and cooling rates were analyzed and results showed that higher cooling rates result in finer microstructures allowing a reduction in heat treatment time to achieve the desirable properties in the final product (spheroidized round wire rod).

Advisors/Committee Members: Reguly, Afonso.

Subjects/Keywords: Laminação a quente; Hot rolling; Cooling rate; Tratamento térmico; Aço; Thermomechanical rolling; Spheroidizing; Microstructure; Wire rod; DIN 41Cr4

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APA (6^th Edition):

Becker, R. H. S. (2012). Estudo da influência da taxa de resfriamento e temperatura nos últimos passes de laminação de fio máquina sobre a resposta ao tratamento térmico de esferoidização em um aço DIN 41Cr4. (Thesis). Universidade do Rio Grande do Sul. Retrieved from http://hdl.handle.net/10183/96658

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Becker, Renata Helena Santer. “Estudo da influência da taxa de resfriamento e temperatura nos últimos passes de laminação de fio máquina sobre a resposta ao tratamento térmico de esferoidização em um aço DIN 41Cr4.” 2012. Thesis, Universidade do Rio Grande do Sul. Accessed February 21, 2019. http://hdl.handle.net/10183/96658.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Becker, Renata Helena Santer. “Estudo da influência da taxa de resfriamento e temperatura nos últimos passes de laminação de fio máquina sobre a resposta ao tratamento térmico de esferoidização em um aço DIN 41Cr4.” 2012. Web. 21 Feb 2019.

Vancouver:

Becker RHS. Estudo da influência da taxa de resfriamento e temperatura nos últimos passes de laminação de fio máquina sobre a resposta ao tratamento térmico de esferoidização em um aço DIN 41Cr4. [Internet] [Thesis]. Universidade do Rio Grande do Sul; 2012. [cited 2019 Feb 21]. Available from: http://hdl.handle.net/10183/96658.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Becker RHS. Estudo da influência da taxa de resfriamento e temperatura nos últimos passes de laminação de fio máquina sobre a resposta ao tratamento térmico de esferoidização em um aço DIN 41Cr4. [Thesis]. Universidade do Rio Grande do Sul; 2012. Available from: http://hdl.handle.net/10183/96658

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brno University of Technology

19. Sigmund, Lukáš. Válcování profilů .

Degree: 2016, Brno University of Technology

URL: http://hdl.handle.net/11012/60018

► Práce se zabývá popisem technologie výroby profilů válcováním za tepla. Definuje podmínky, které se musí při válcování splnit, aby se samotný proces uskutečnil. Dále je… (more)

Subjects/Keywords: Válcování za tepla; profil; VÚHŽ a.s.; podmínky válcování; kalibry; Hot rolling; profile; VÚHŽ a.s.; rolling conditions; calibres

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APA (6^th Edition):

Sigmund, L. (2016). Válcování profilů . (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/60018

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sigmund, Lukáš. “Válcování profilů .” 2016. Thesis, Brno University of Technology. Accessed February 21, 2019. http://hdl.handle.net/11012/60018.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sigmund, Lukáš. “Válcování profilů .” 2016. Web. 21 Feb 2019.

Vancouver:

Sigmund L. Válcování profilů . [Internet] [Thesis]. Brno University of Technology; 2016. [cited 2019 Feb 21]. Available from: http://hdl.handle.net/11012/60018.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sigmund L. Válcování profilů . [Thesis]. Brno University of Technology; 2016. Available from: http://hdl.handle.net/11012/60018

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

20. Hellqvist, Anna. The Process Influence on Strength Properties of an Austenitic Stainless Steel (254 SMO).

Degree: Science and Technology, 2014, Örebro University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-35545

►

This work has been performed at Outokumpu Stainless AB, QPE, in Degerfors where focus is on production of hot rolled tailor-made quarto plate in… (more)

▼

This work has been performed at Outokumpu Stainless AB, QPE, in Degerfors where focus is on production of hot rolled tailor-made quarto plate in special stainless steel grades such as highly alloyed austenitics and duplex steel grades. After a period with low values in strength and a lot of deviations in tensile tests for the highly alloyed austenitic stainless steel, 254 SMO, there was a need to investigate what influence some parameters during process has on strength values. Process parameters during hot rolling and levelling have been examined to see if there is a connection between these and the strength. A statistical data base has been created to investigate the connection with strength. There has been experimental work involving two test plates in different dimensions to see how a double/extended heat treatment influence the sigma phase values and grain size, and if these can be connected to the strength values. The test plates have also been used to investigate how the position of the test coupon is affecting the tensile test result. Moreover, there have been tests performed in the cold plate leveller. The strength is a complex problem since there are many parameters that contribute to a variation in strength value. It is possible to see an influence from the investigated parameters, but their individual impact on strength varies. There are several indications in the results that the flatness seems to be a factor affecting the variation in strength. However, there is a need for more thorough investigations where the flatness can be measured to completely verify this

Det här arbetet har utförts på Outokumpu Stainless AB, QPE, i Degerfors där man inriktar sig på produktion av varmvalsad, skräddarsydd kvartoplåt i olika specialstål som höglegerade austeniter och duplexa stålsorter. Efter en period med låga värden i hållfasthet och många avvikelser i provning för ett höglegerat austenitiskt stål, 254 SMO, så fanns ett behov av att undersöka vissa parametrars inverkan på hållfastheten. Processparametrar vid valsning och riktning har undersökts för att se om det går att se ett samband mellan dessa och hållfastheten. Statistisk data har tagits fram för att undersöka sambandet med hållfastheten. Även experimentella försök har gjorts, främst på två testplåtar i olika dimensioner, för att se hur en dubbel/förlängd värmebehandling påverkar sigmafas och kornstorlek men även om dessa värden, genom försöken, kan kopplas till hållfasthetsvärden. Plåtarna har också använts till att se hur testresultatet påverkas av var i plåten som testkupongen tas ut. Dessutom har det gjorts försök i riktverket med olika parametrar. Hållfastheten är ett komplext problem att utreda eftersom det finns så många parametrar som ger en variation i resultaten. Det är möjligt att se en påverkan från flera av de undersökta parametrarna men deras individuella påverkan på hållfastheten varierar. Det finns många indikationer i resultaten som pekar på att planheten verkar vara en faktor som…

Subjects/Keywords: stainless steel; hot rolling; levelling; strength; material properties; process parameters; Mechanical Engineering; Maskinteknik

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APA (6^th Edition):

Hellqvist, A. (2014). The Process Influence on Strength Properties of an Austenitic Stainless Steel (254 SMO). (Thesis). Örebro University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-35545

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Hellqvist, Anna. “The Process Influence on Strength Properties of an Austenitic Stainless Steel (254 SMO).” 2014. Thesis, Örebro University. Accessed February 21, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-35545.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Hellqvist, Anna. “The Process Influence on Strength Properties of an Austenitic Stainless Steel (254 SMO).” 2014. Web. 21 Feb 2019.

Vancouver:

Hellqvist A. The Process Influence on Strength Properties of an Austenitic Stainless Steel (254 SMO). [Internet] [Thesis]. Örebro University; 2014. [cited 2019 Feb 21]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-35545.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hellqvist A. The Process Influence on Strength Properties of an Austenitic Stainless Steel (254 SMO). [Thesis]. Örebro University; 2014. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-35545

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Pretoria

21. Annan, Kofi Ahomkah. Effect of hot working characteristics on the texture development in AISI 430 and 433 ferritic stainless steel.

Degree: Materials Science and Metallurgical Engineering, 2013, University of Pretoria

URL: http://hdl.handle.net/2263/25436

► The last seven hot rolling passes of the ferritic stainless steels (FSS) AISI 430 and AISI 433 (the latter an Al-added variant of 430) were… (more)

Subjects/Keywords: Dynamic recrystallization; Electron backscattering diffraction; Dynamic recovery; Ferritic stainless steels (fss); Ebsd; Hot rolling; UCTD

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Annan, K. A. (2013). Effect of hot working characteristics on the texture development in AISI 430 and 433 ferritic stainless steel. (Masters Thesis). University of Pretoria. Retrieved from http://hdl.handle.net/2263/25436

Chicago Manual of Style (16^th Edition):

Annan, Kofi Ahomkah. “Effect of hot working characteristics on the texture development in AISI 430 and 433 ferritic stainless steel.” 2013. Masters Thesis, University of Pretoria. Accessed February 21, 2019. http://hdl.handle.net/2263/25436.

MLA Handbook (7^th Edition):

Annan, Kofi Ahomkah. “Effect of hot working characteristics on the texture development in AISI 430 and 433 ferritic stainless steel.” 2013. Web. 21 Feb 2019.

Vancouver:

Annan KA. Effect of hot working characteristics on the texture development in AISI 430 and 433 ferritic stainless steel. [Internet] [Masters thesis]. University of Pretoria; 2013. [cited 2019 Feb 21]. Available from: http://hdl.handle.net/2263/25436.

Council of Science Editors:

Annan KA. Effect of hot working characteristics on the texture development in AISI 430 and 433 ferritic stainless steel. [Masters Thesis]. University of Pretoria; 2013. Available from: http://hdl.handle.net/2263/25436

The Ohio State University

22. Zhu, Yijun. Computational Approach to Defect Reduction in Hot Extrusion and Rolling with Material and Process Uncertainties.

Degree: PhD, Industrial and Systems Engineering, 2009, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1259773708

► The essence of manufacturing is predictability and repeatability. However, due to the inherent nature of randomness and heterogeneity in material, and process variations in… (more)

▼ The essence of manufacturing is predictability and repeatability. However, due to the inherent nature of randomness and heterogeneity in material, and process variations in the manufacturing, the current deterministic design methods create defects or nonconformance, which are very difficult to prevent. Inclusion of uncertainty in the process design and the optimization cycle will bring better understanding of its impact on the product quality. To date, there are very few studies that incorporate risk of defects formation into the design and optimization of multi-stage metal forming process. In this study, uncertainty in process and material parameters is included in the modeling of extrusion (single machine) and hot rolling (multiple machines) processes. These models are demonstrated for process optimization that leads to more reliable design solutions where defects can be greatly reduced because of the insensitivity of the solution to the process variations. In this dissertation, we propose a computational approach to study the influence of uncertainty on the characteristics of defects in extrusion and hot rolling processes. Calibrated deterministic physical models are built in computer codes that replace the industrial process. They are fundamental tools that utilize the efficiency and accuracy of finite element method (FEM), and provide rich physical information through proper Design of Experiments (DOE) that investigate the mechanism of defect formation. A novel extrusion speed instability model is introduced into the code for investigation of sensitivity of system response to material instability and allows extrusion at high speeds. A new control scheme is proposed, by analysis of simulation results, through an appropriate predictive model as the reliable solution for defects reduction. The most robust setting of extrusion temperature and speed is found on a changed solution space in the predictive model. In hot rolling, a new method based on the strain-state on the surface of the rolled billet is successfully developed and applied to the investigation of risk of surface cracking in the rough rolling process. Due to the coupling nature of the strain distributions in the multiple step deformation, single machine FEM model with traditional DOE-RSM approach cannot resolve the problem. Instead, specialized multi-machine FEM code – ROLPAS, with new criterion based on surface strain state for estimation of risk of surface cracking, is used to solve the problem for low computational cost. A sequential optimization technique based on the proper selection of DOE, integrated with iteratively updated meta-models, was successfully applied to find the optimal reduction configuration of hot rolling process that greatly reduced the risk of surface cracking. By intentionally incorporating uncertainty into empirical material models and process metal models using Monte Carlo simulation and other reliability analysis methods, the risk of defect formation has been successfully assessed. Finally, the most reliable… Advisors/Committee Members: Shivpuri, Rajiv (Advisor).

Subjects/Keywords: Industrial Engineering; Metallurgy; Statistics; Systems Design; Process Uncertainty; Tube Extrusion; Hot Rolling; Defect Reduction

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zhu, Y. (2009). Computational Approach to Defect Reduction in Hot Extrusion and Rolling with Material and Process Uncertainties. (Doctoral Dissertation). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1259773708

Chicago Manual of Style (16^th Edition):

Zhu, Yijun. “Computational Approach to Defect Reduction in Hot Extrusion and Rolling with Material and Process Uncertainties.” 2009. Doctoral Dissertation, The Ohio State University. Accessed February 21, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1259773708.

MLA Handbook (7^th Edition):

Zhu, Yijun. “Computational Approach to Defect Reduction in Hot Extrusion and Rolling with Material and Process Uncertainties.” 2009. Web. 21 Feb 2019.

Vancouver:

Zhu Y. Computational Approach to Defect Reduction in Hot Extrusion and Rolling with Material and Process Uncertainties. [Internet] [Doctoral dissertation]. The Ohio State University; 2009. [cited 2019 Feb 21]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1259773708.

Council of Science Editors:

Zhu Y. Computational Approach to Defect Reduction in Hot Extrusion and Rolling with Material and Process Uncertainties. [Doctoral Dissertation]. The Ohio State University; 2009. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1259773708

NSYSU

23. Wang, Kuo-hsing. Parameter Analysis and Establishment of Empirical Equations During Hot Rolling Processes of Aluminum Alloy 5182.

Degree: PhD, Mechanical and Electro-Mechanical Engineering, 2014, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0801114-120611

► Aluminum alloy 5182 (AA5182) has been widely used in beverage cans, automobile parts, computer, communication and consumer electronics (3C) products for excellent properties, such as… (more)

▼ Aluminum alloy 5182 (AA5182) has been widely used in beverage cans, automobile parts, computer, communication and consumer electronics (3C) products for excellent properties, such as high strength-to-weight ratio, electro-magnetic shielding, better corrosion resistance, and recyclable etc. The strain and temperature of the hot rolled strip affect the microstructure of material as well as change the strength and formability of the product. In order to improve the product performance, it is essential to understand the effect of process parameters during hot rolling on the strain and temperature of the strip. Several studies have been published to investigate the effects of strain and temperature on the recrystallization behavior of AA5182 strip during hot rolling. However, only a few studies published discussed the effects of process parameters on the strain and temperature distributions of AA5182 strip during hot rolling. In this study, the finite element simulations of the strain and temperature distributions of AA5182 during hot rolling were carried out by using a commercial code DEFORM. Firstly, the cylindrical compression tests were performed to obtain the mean flow stress curves of AA5182 at strain rates of 0.01 s-1 to 30.0 s-1 under 320 °C to 470 °C by using Gleeble thermal-mechanical simulator for understanding the strength of material at elevated temperatures. The mean flow stress curves were applied to simulate the hot rolling of AA5182 strip. The relationships between the mean flow stress obtained by the cylindrical compression test and material flow stress were established by using the finite element simulations. It is known that the error between the mean flow stress and material flow stress is about 2% to 4% during the cylindrical compression test considering the effect of friction at the interface between the cylindrical and anvils. A hyperbolic-sine Arrhenius equation was used to characterize the flow stress curves of aluminum alloy 5182. The parameters of characterization equation were obtained by using experimental data and the least square method. The error between the prediction results obtained by the characterization equation and the experimental data is within 10%. Secondly, the finite element simulations of hot rolling were carried out to investigate the effects of process parameters and boundary conditions involved reduction in thickness, entry thickness, rolling speed, coefficient of coulomb friction and interfacial heat transfer coefficient on temperature variation of the strip and distributions of strain and temperature in the thickness direction at the roll bite exit. The results of simulations were applied to the prediction model of static recrystallization behavior proposed by literature and discussed the effect of process parameters and boundary conditions mentioned above on static recrystallization behavior. The mechanisms about effects of process parameters and boundary conditions on strain, temperature, and static recrystallization behavior of the strip were proposed. Finally, the… Advisors/Committee Members: Fuh-kuo Chen (chair), Woei-shyan Lee (chair), Yeong-maw Hwang (committee member), You-min Huang (chair), Jao-hwa Kuang (chair), Gow-yi Tzou (chair), Wei-ching, Yeh (chair), Yuang-cherng Chiou (chair), Shi-rong Chen (chair).

Subjects/Keywords: aluminum alloy 5182; strain; empirical equation; temperature; finite element simulation; flow stress; hot rolling

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APA (6^th Edition):

Wang, K. (2014). Parameter Analysis and Establishment of Empirical Equations During Hot Rolling Processes of Aluminum Alloy 5182. (Doctoral Dissertation). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0801114-120611

Chicago Manual of Style (16^th Edition):

Wang, Kuo-hsing. “Parameter Analysis and Establishment of Empirical Equations During Hot Rolling Processes of Aluminum Alloy 5182.” 2014. Doctoral Dissertation, NSYSU. Accessed February 21, 2019. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0801114-120611.

MLA Handbook (7^th Edition):

Wang, Kuo-hsing. “Parameter Analysis and Establishment of Empirical Equations During Hot Rolling Processes of Aluminum Alloy 5182.” 2014. Web. 21 Feb 2019.

Vancouver:

Wang K. Parameter Analysis and Establishment of Empirical Equations During Hot Rolling Processes of Aluminum Alloy 5182. [Internet] [Doctoral dissertation]. NSYSU; 2014. [cited 2019 Feb 21]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0801114-120611.

Council of Science Editors:

Wang K. Parameter Analysis and Establishment of Empirical Equations During Hot Rolling Processes of Aluminum Alloy 5182. [Doctoral Dissertation]. NSYSU; 2014. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0801114-120611

NSYSU

24. Yeh, Tso-lun. Microstructure Prediction During Hot Rolling Processes of Magnesium Alloy Sheets.

Degree: Master, Mechanical and Electro-Mechanical Engineering, 2015, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0726115-162125

► Magnesium alloys have various characteristics, such as high strength, low density, strong shock absorption ability, electromagnetic shielding and good thermal conductivity. They are widely applied… (more)

▼ Magnesium alloys have various characteristics, such as high strength, low density, strong shock absorption ability, electromagnetic shielding and good thermal conductivity. They are widely applied in electronic products and aerospace industries. In this study, in order to make the product have better mechanical properties, using dynamic recrystallization (DRX) to make grain refinement to increase the strength of the product by applying plastic deformation in hot-working. The flow stress of Magnesium alloy ZK60 can be obtained by compression test. The peak of the flow stress, including peak stress and peak strain, and the strain of 50% DRX strain can be applied in DRX prediction equation by using mathematical regression method. After the DRX prediction equation is done, key in FEM software DEFORM-2D to predict the effects of magnesium alloy ZK60 dynamic recrystallization behavior in hot-rolling and rolling process conditions. The simulation results show that a rolling temperature of 400 â and a thickness reduction of 40% are the optimal conditions. An average grain size of 0.55 Î¼m- 1.37 Î¼m in the microstructure is obtained and the strength and formability of ZK60 magnesium alloys is improved. Finally, this study has made one pass and multi-pass hot-rolling experiment by changing different process conditions, such as, temperature, pressure ratio and roll temperature, etc.. After the metallographic microstructure observation, comparison under the same process conditions degree of recrystallization and grain size, as well as do a series of mechanical properties are discussed and resolved to verify the correctness of the simulation. The experimental results show the average grain size of sheet temperature of 400 â after rolling have large errors, because the grain growing rate is too fast. The error of the measurement result of average grain size at 300 â is about 30%. Advisors/Committee Members: Fuk-Kuo Chen (chair), Yeong-Maw Hwang (committee member), Wei-Ching Yea (chair), Woei-shyan Lee (chair), Jin-Zhong Xu (chair).

Subjects/Keywords: grain size; microstructure; Hot rolling; the flow stress; compression test; dynamic recrystallization

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APA (6^th Edition):

Yeh, T. (2015). Microstructure Prediction During Hot Rolling Processes of Magnesium Alloy Sheets. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0726115-162125

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Yeh, Tso-lun. “Microstructure Prediction During Hot Rolling Processes of Magnesium Alloy Sheets.” 2015. Thesis, NSYSU. Accessed February 21, 2019. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0726115-162125.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Yeh, Tso-lun. “Microstructure Prediction During Hot Rolling Processes of Magnesium Alloy Sheets.” 2015. Web. 21 Feb 2019.

Vancouver:

Yeh T. Microstructure Prediction During Hot Rolling Processes of Magnesium Alloy Sheets. [Internet] [Thesis]. NSYSU; 2015. [cited 2019 Feb 21]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0726115-162125.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Yeh T. Microstructure Prediction During Hot Rolling Processes of Magnesium Alloy Sheets. [Thesis]. NSYSU; 2015. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0726115-162125

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Pretoria

25. [No author]. Effect of hot working characteristics on the texture development in AISI 430 and 433 ferritic stainless steel .

Degree: 2013, University of Pretoria

URL: http://upetd.up.ac.za/thesis/available/etd-06102013-170011/

► The last seven hot rolling passes of the ferritic stainless steels (FSS) AISI 430 and AISI 433 (the latter an Al-added variant of 430) were… (more)

Subjects/Keywords: Dynamic recrystallization; Electron backscattering diffraction; Dynamic recovery; Ferritic stainless steels (fss); Ebsd; Hot rolling; UCTD

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

author], [. (2013). Effect of hot working characteristics on the texture development in AISI 430 and 433 ferritic stainless steel . (Masters Thesis). University of Pretoria. Retrieved from http://upetd.up.ac.za/thesis/available/etd-06102013-170011/

Chicago Manual of Style (16^th Edition):

author], [No. “Effect of hot working characteristics on the texture development in AISI 430 and 433 ferritic stainless steel .” 2013. Masters Thesis, University of Pretoria. Accessed February 21, 2019. http://upetd.up.ac.za/thesis/available/etd-06102013-170011/.

MLA Handbook (7^th Edition):

author], [No. “Effect of hot working characteristics on the texture development in AISI 430 and 433 ferritic stainless steel .” 2013. Web. 21 Feb 2019.

Vancouver:

author] [. Effect of hot working characteristics on the texture development in AISI 430 and 433 ferritic stainless steel . [Internet] [Masters thesis]. University of Pretoria; 2013. [cited 2019 Feb 21]. Available from: http://upetd.up.ac.za/thesis/available/etd-06102013-170011/.

Council of Science Editors:

author] [. Effect of hot working characteristics on the texture development in AISI 430 and 433 ferritic stainless steel . [Masters Thesis]. University of Pretoria; 2013. Available from: http://upetd.up.ac.za/thesis/available/etd-06102013-170011/

Universidade do Rio Grande do Sul

26. Rodrigues, Ricardo Adornes. Comparativo entre o fio máquina produzido com aço SAE 1005 e SAE 1405 modificados para produção de arames recozidos.

Degree: 2012, Universidade do Rio Grande do Sul

URL: http://hdl.handle.net/10183/85051

►

O presente trabalho visa entender as relações entre as propriedades mecânicas e a composição química de fio-máquinas produzidos com aços SAE 1005 e SAE 1405… (more)

Subjects/Keywords: Laminação a quente; Wire rod; Aço; Mechanical properties; Propriedades mecânicas dos materiais; Hot rolling mill

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APA (6^th Edition):

Rodrigues, R. A. (2012). Comparativo entre o fio máquina produzido com aço SAE 1005 e SAE 1405 modificados para produção de arames recozidos. (Thesis). Universidade do Rio Grande do Sul. Retrieved from http://hdl.handle.net/10183/85051

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Rodrigues, Ricardo Adornes. “Comparativo entre o fio máquina produzido com aço SAE 1005 e SAE 1405 modificados para produção de arames recozidos.” 2012. Thesis, Universidade do Rio Grande do Sul. Accessed February 21, 2019. http://hdl.handle.net/10183/85051.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Rodrigues, Ricardo Adornes. “Comparativo entre o fio máquina produzido com aço SAE 1005 e SAE 1405 modificados para produção de arames recozidos.” 2012. Web. 21 Feb 2019.

Vancouver:

Rodrigues RA. Comparativo entre o fio máquina produzido com aço SAE 1005 e SAE 1405 modificados para produção de arames recozidos. [Internet] [Thesis]. Universidade do Rio Grande do Sul; 2012. [cited 2019 Feb 21]. Available from: http://hdl.handle.net/10183/85051.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Rodrigues RA. Comparativo entre o fio máquina produzido com aço SAE 1005 e SAE 1405 modificados para produção de arames recozidos. [Thesis]. Universidade do Rio Grande do Sul; 2012. Available from: http://hdl.handle.net/10183/85051

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Virginia Tech

27. Stewart, William Elliott. A Response Surface Exit Crown Model Built from the Finite Element Analysis of a Hot-Rolling Mill.

Degree: Mechanical Engineering, 2011, Virginia Tech

URL: http://hdl.handle.net/10919/45203

► Nine independent and four dependent variables are used to build a response surface to calculate strip crown using the difference in the industry standard strip… (more)

▼ Nine independent and four dependent variables are used to build a response surface to calculate strip crown using the difference in the industry standard strip height measurements. The single element response surface in use provides the advantages of continuous derivatives and decouples rolling load from the determination of exit height. The data points to build the response surface are the product of a calibrated finite element model. The rolling dynamics in the finite element model creates a transient that requires nonlinear regression to find the system steady-state values. Weighted-least squares is used to build a response surface using isoparametric interpolation with the non-rectangular domain of the mill stands represented as a single element. The regression statistics, the 1-D projections, comparisons against other response surface models and the comparisons against an existing strip crown model are part the validation of the response surface generated. A four-high mill stand is modeled as a quarter-symmetry 3-D finite element model with an elastic-plastic material model. A comparison of the pressure distribution under the arc of contact with existing research supports the pressure distribution found with experiments conducted by Siebel and Lueg [16] and it also suggests the need for one improvement in the initial velocity for the strip in the finite element model. The strip exit heights show more sensitivity to change than strip exit crown in seven out of the nine independent variables, so a response surface built with the strip exit height is statistically superior to using the derived dependent variable strip exit crown. Sensitivity of strip exit crown and the strip exit heights to changes in work-roll crown are about equal. Backup-roll diameter sensitivity is small enough that oversampling for the mean trend has to be considered or ignore backup-roll altogether. Strip entry velocity is a new independent variable, unless the response surface is built from the derived variable, strip exit crown. A problem found is that the sensitivity of strip entry crown and work-roll crown requires a larger than typical incremental change to get a reliable measure of the change strip exit crown. A narrow choice of high and low strip entry crowns limits the usefulness of the final response surface. A recommendation is to consider the use of the strip cross-section as an exit crown predictor. Advisors/Committee Members: Atkinson, James E. (committee member), West, Robert L. Jr. (committeecochair), Baumann, William T. (committeecochair).

Subjects/Keywords: Finite Elements; Response surface model; Hot-rolling mill; Strip exit crown; Dynamic Simulation

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APA (6^th Edition):

Stewart, W. E. (2011). A Response Surface Exit Crown Model Built from the Finite Element Analysis of a Hot-Rolling Mill. (Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/45203

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Stewart, William Elliott. “A Response Surface Exit Crown Model Built from the Finite Element Analysis of a Hot-Rolling Mill.” 2011. Thesis, Virginia Tech. Accessed February 21, 2019. http://hdl.handle.net/10919/45203.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Stewart, William Elliott. “A Response Surface Exit Crown Model Built from the Finite Element Analysis of a Hot-Rolling Mill.” 2011. Web. 21 Feb 2019.

Vancouver:

Stewart WE. A Response Surface Exit Crown Model Built from the Finite Element Analysis of a Hot-Rolling Mill. [Internet] [Thesis]. Virginia Tech; 2011. [cited 2019 Feb 21]. Available from: http://hdl.handle.net/10919/45203.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Stewart WE. A Response Surface Exit Crown Model Built from the Finite Element Analysis of a Hot-Rolling Mill. [Thesis]. Virginia Tech; 2011. Available from: http://hdl.handle.net/10919/45203

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Wollongong

28. Yu, Xianglong. A study of oxides formed on hot-rolled steel strip.

Degree: PhD, 2014, University of Wollongong

URL: 091006 Manufacturing Processes and Technologies (excl. Textiles) ; https://ro.uow.edu.au/theses/4146

► Metallic oxide (scale) inevitably grows on the surface of hot-rolled strips due to thermal oxidation at elevated temperature and causes the surface quality of… (more)

Subjects/Keywords: Hot rolling; Oxide scale; High temperature oxidation; Texture; Tribological properties; Electron backscattered diffraction (EBSD)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Yu, X. (2014). A study of oxides formed on hot-rolled steel strip. (Doctoral Dissertation). University of Wollongong. Retrieved from 091006 Manufacturing Processes and Technologies (excl. Textiles) ; https://ro.uow.edu.au/theses/4146

Chicago Manual of Style (16^th Edition):

Yu, Xianglong. “A study of oxides formed on hot-rolled steel strip.” 2014. Doctoral Dissertation, University of Wollongong. Accessed February 21, 2019. 091006 Manufacturing Processes and Technologies (excl. Textiles) ; https://ro.uow.edu.au/theses/4146.

MLA Handbook (7^th Edition):

Yu, Xianglong. “A study of oxides formed on hot-rolled steel strip.” 2014. Web. 21 Feb 2019.

Vancouver:

Yu X. A study of oxides formed on hot-rolled steel strip. [Internet] [Doctoral dissertation]. University of Wollongong; 2014. [cited 2019 Feb 21]. Available from: 091006 Manufacturing Processes and Technologies (excl. Textiles) ; https://ro.uow.edu.au/theses/4146.

Council of Science Editors:

Yu X. A study of oxides formed on hot-rolled steel strip. [Doctoral Dissertation]. University of Wollongong; 2014. Available from: 091006 Manufacturing Processes and Technologies (excl. Textiles) ; https://ro.uow.edu.au/theses/4146

Lehigh University

29. Alharthi, Nabeel Hussain. Evaluation and Prediction of Microstructure Evolution in Deformed Aluminum Alloys.

Degree: MS, Mechanical Engineering, 2011, Lehigh University

URL: https://preserve.lehigh.edu/etd/1184

Subjects/Keywords: Aluminum; Asymmetrical Rolling; Hot Extrusion; Microstructure Evolution; Mechanical Engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Alharthi, N. H. (2011). Evaluation and Prediction of Microstructure Evolution in Deformed Aluminum Alloys. (Thesis). Lehigh University. Retrieved from https://preserve.lehigh.edu/etd/1184

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Alharthi, Nabeel Hussain. “Evaluation and Prediction of Microstructure Evolution in Deformed Aluminum Alloys.” 2011. Thesis, Lehigh University. Accessed February 21, 2019. https://preserve.lehigh.edu/etd/1184.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Alharthi, Nabeel Hussain. “Evaluation and Prediction of Microstructure Evolution in Deformed Aluminum Alloys.” 2011. Web. 21 Feb 2019.

Vancouver:

Alharthi NH. Evaluation and Prediction of Microstructure Evolution in Deformed Aluminum Alloys. [Internet] [Thesis]. Lehigh University; 2011. [cited 2019 Feb 21]. Available from: https://preserve.lehigh.edu/etd/1184.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Alharthi NH. Evaluation and Prediction of Microstructure Evolution in Deformed Aluminum Alloys. [Thesis]. Lehigh University; 2011. Available from: https://preserve.lehigh.edu/etd/1184

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Oulu

30. Alatarvas, T. (Tuomas). Evolution of inclusion population in calcium treated ultra-high strength steels:novel applications of sample data treatment.

Degree: 2018, University of Oulu

URL: http://urn.fi/urn:isbn:9789526220987

►

Abstract Non-metallic inclusions are unavoidable particles in steel and are often detrimental to the steelmaking process and the mechanical properties of the steel. While it… (more)

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Abstract Non-metallic inclusions are unavoidable particles in steel and are often detrimental to the steelmaking process and the mechanical properties of the steel. While it is not feasible to remove all inclusions, in the well-established calcium treatment of aluminium-killed steel, solid aluminium oxides are transformed into less harmful liquid calcium aluminates. The main objective of this work was to develop a new inclusion identification and classification method. The presented method offers valuable information on phases of the inclusions. This data is often buried within simple inclusion classification criteria. The method offers the best approximation of the phases in each inclusion detected with minimal time, if no time-consuming elemental map analyses are available. In this work, applications for the inclusion phase identification method are presented. Utilising the method, the dispersion and evolution of inclusions during the sampling of liquid steel in lollipop samples is investigated, as well as the evolution of inclusions during continuous casting. New information is obtained on the elongation of inclusions and formation of oxide–sulphide stringers during hot rolling. The results for the investigated steels show that with sulphur contents higher than 10 ppm, calcium aluminates were back-modified to alumina and spinel inclusions during casting. However, with decreasing sulphur contents, and adequate simultaneous calcium treatment of oxides, Al₂O₃ and spinel formation is hindered or even avoided. The most elongated inclusions are often also found in stringers. According to the results of this study, low melting calcium aluminate inclusions are not the most elongated oxide inclusions in the hot rolled product. With moderate calcium treatment, an optimal oxide composition can be obtained, found within the C12A7–CA–MgO composition. These liquid inclusions ensure good castability, while they do not easily elongate or fragment into detrimental stringers after continuous casting.

Tiivistelmä Epämetalliset sulkeumat ovat väistämättä osa terästä, ja ne aiheuttavat ongelmia prosessille ja teräksen mekaanisille ominaisuuksille. Sulkeumien poiston sijaan niiden koostumusta muokataan kalsiumkäsittelyllä. Tällöin kiinteät alumiinioksidit muuttuvat vähemmän ongelmallisiksi suliksi kalsiumaluminaateiksi. Tämän työn päätavoitteena oli kehittää uusi sulkeumien tunnistus- ja luokittelumenetelmä. Sulkeuma-analyysien data voi jäädä hyödyntämättä, jos luokitteluun käytetään yksinkertaisia kriteerejä. Työssä esitetty menetelmä antaa parhaan arvion sulkeumissa olevista faaseista, mikäli sulkeumista ei ole alkuainekarttoja, joiden muodostaminen vie huomattavasti aikaa. Väitöskirjassa esitetään sulkeumien tunnistus- ja luokittelumenetelmän soveltamiskohteita. Menetelmän avulla tutkitaan sulkeumien muutosta ja jakaantumista sulan teräksen näytteenotossa ja sulkeumakuvan muutosta jatkuvavalun aikana. Uutta tietoa esitetään oksidi-sulfidiketjujen muodostumisesta kuumavalssauksen aikana. Tutkituilla teräksillä…

Advisors/Committee Members: Fabritius, T. (Timo), Louhenkilpi, S. (Seppo), Heikkinen, E. (Eetu-Pekka).

Subjects/Keywords: calcium treatment; hot rolling; liquid steel sampling; non-metallic inclusions; steel; kalsiumkäsittely; kuumavalssaus; näytteenotto; sulkeumat; teräs

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Alatarvas, T. (. (2018). Evolution of inclusion population in calcium treated ultra-high strength steels:novel applications of sample data treatment. (Doctoral Dissertation). University of Oulu. Retrieved from http://urn.fi/urn:isbn:9789526220987

Chicago Manual of Style (16^th Edition):

Alatarvas, T (Tuomas). “Evolution of inclusion population in calcium treated ultra-high strength steels:novel applications of sample data treatment.” 2018. Doctoral Dissertation, University of Oulu. Accessed February 21, 2019. http://urn.fi/urn:isbn:9789526220987.

MLA Handbook (7^th Edition):

Alatarvas, T (Tuomas). “Evolution of inclusion population in calcium treated ultra-high strength steels:novel applications of sample data treatment.” 2018. Web. 21 Feb 2019.

Vancouver:

Alatarvas T(. Evolution of inclusion population in calcium treated ultra-high strength steels:novel applications of sample data treatment. [Internet] [Doctoral dissertation]. University of Oulu; 2018. [cited 2019 Feb 21]. Available from: http://urn.fi/urn:isbn:9789526220987.

Council of Science Editors:

Alatarvas T(. Evolution of inclusion population in calcium treated ultra-high strength steels:novel applications of sample data treatment. [Doctoral Dissertation]. University of Oulu; 2018. Available from: http://urn.fi/urn:isbn:9789526220987

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