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You searched for +publisher:"McMaster University" +contributor:("Metallurgical Engineering"). Showing records 1 – 3 of 3 total matches.

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McMaster University

1. Lakshmanan, V.K. Thermodynamics of the Interstitial Phases of Niobium in Iron Austenite.

Degree: ME, 1977, McMaster University

The austenite-niobium carbonitride equilibrium has been accurately characterized between 1000°C and 1250°C for commercial steel compositions. A closed capsule technique using hydrogen as carrier gas has been employed to equilibrate Fe-Nb alloys with Fe-C alloys and determine the Υ/Υ+NbCx phase boundary in the temperature range 1000-1250°C. The results have been used to define the solubility of niobium carbide in austenite with improved accuracy. Solubility limits have also been determined by chemical analysis of carbides extracted from a laboratory melted steel. A defect carbide NbC₀.₉ and a carbonitride NbC₀.₉₁N₀.₀₄ have been identified as the equilibrium precipitate compositions at 1000°C in two steels. To test the data for thermodynamic consistency detailed analysis of the thermochemical data of the defect carbides of niobium has been made. The thermodynamics of the binary Fe-C, Fe-Nb and Nb-C systems have been utilized to determine the Υ/Υ+NbCx equilibrium over relevant composition and temperature ranges and this is in good agreement with the experiments. Solubility product relations are given for the carbide NbC0.87 as this carbide composition has been shown to be a justifiable average equilibrium composition over the temperature range in this study. The carbide solubility relations have been used along with the reported carbonitride solubilities, to estimate the solubility relation for a metastable cubic nitride of composition NbN₀.₈₇. An accurate method for calculating the composition and solubility of nonstoichiometric carbonitride precipitates in steel has been devised using the above carbide and nitride solubility relations and treating the carbonitrides as compounds with a fixed nonstoichiometry NbCxN(₀.₈₇-x). The effects of Mn, Si, Cr, Ni and Mo on the solubilities of carbonitrides have also been evaluated and it is shown that the carbonitride solubility in a multi-component austenite can be satisfactory predicted. It is therefore possible to calculate, for example, precipitate fractions and theoretical maximum temperatures required in slab reheating to completely dissolve precipitates.

Master of Engineering (ME)

Advisors/Committee Members: Kirkaldy, J.S., Metallurgical Engineering.

Subjects/Keywords: Metallurgy; Metallurgy

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

APA (6th Edition):

Lakshmanan, . V. K. (1977). Thermodynamics of the Interstitial Phases of Niobium in Iron Austenite. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/8433

Chicago Manual of Style (16th Edition):

Lakshmanan, V K. “Thermodynamics of the Interstitial Phases of Niobium in Iron Austenite.” 1977. Masters Thesis, McMaster University. Accessed February 22, 2019. http://hdl.handle.net/11375/8433.

MLA Handbook (7th Edition):

Lakshmanan, V K. “Thermodynamics of the Interstitial Phases of Niobium in Iron Austenite.” 1977. Web. 22 Feb 2019.

Vancouver:

Lakshmanan VK. Thermodynamics of the Interstitial Phases of Niobium in Iron Austenite. [Internet] [Masters thesis]. McMaster University; 1977. [cited 2019 Feb 22]. Available from: http://hdl.handle.net/11375/8433.

Council of Science Editors:

Lakshmanan VK. Thermodynamics of the Interstitial Phases of Niobium in Iron Austenite. [Masters Thesis]. McMaster University; 1977. Available from: http://hdl.handle.net/11375/8433


McMaster University

2. Jha, Gyanendra Kumar. Localised Corrosion of Austenitic Stainless Steels.

Degree: ME, 1971, McMaster University

The localised corrosion behaviour of various grades of Austenitic Stainless Steels has been demonstrated by optical and electron microscopy. The effect of sensitisation upon subsequent corrosive attack has been investigated. A theoretical model based upon thermodynamic and kinetic considerations has been proposed to account for the observed experimental results.

Thesis

Master of Engineering (ME)

Advisors/Committee Members: Ives, M. B., Metallurgical Engineering.

Subjects/Keywords: metallurgical engineering; localised corrosion; austenitic stainless steel; optical microscopy; electron microscopy; sensitisation

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

APA (6th Edition):

Jha, G. K. (1971). Localised Corrosion of Austenitic Stainless Steels. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/18042

Chicago Manual of Style (16th Edition):

Jha, Gyanendra Kumar. “Localised Corrosion of Austenitic Stainless Steels.” 1971. Masters Thesis, McMaster University. Accessed February 22, 2019. http://hdl.handle.net/11375/18042.

MLA Handbook (7th Edition):

Jha, Gyanendra Kumar. “Localised Corrosion of Austenitic Stainless Steels.” 1971. Web. 22 Feb 2019.

Vancouver:

Jha GK. Localised Corrosion of Austenitic Stainless Steels. [Internet] [Masters thesis]. McMaster University; 1971. [cited 2019 Feb 22]. Available from: http://hdl.handle.net/11375/18042.

Council of Science Editors:

Jha GK. Localised Corrosion of Austenitic Stainless Steels. [Masters Thesis]. McMaster University; 1971. Available from: http://hdl.handle.net/11375/18042


McMaster University

3. Kohli, Charanjit Singh. Stochastic Development of Dissolution Morphology.

Degree: ME, 1970, McMaster University

In order to investigate the formation of different types of pit shapes on the crystalline surfaces, a mathematical model has been considered, which does not take into account surface diffusion and which defines the removal or transformation of different characteristic sites on the surface according to a set of frequencies. The characteristic sites are defined according to Terrace-Ledge-Kink model for the simple cubic crystal. With the help of the geometry of the step systems, specific conditions have been obtained under which the step systems considered could be obtained for a pit of monoatomic thickness. The dissolution of a simple cubic crystal has been simulated according to a set of probabilities.

Thesis

Master of Engineering (ME)

Advisors/Committee Members: Ives, M. B., Metallurgical Engineering.

Subjects/Keywords: dissolution; dissolution morphology; crystal; simple cubic crystal; Terrace-Ledge-Kink model; pit shapes

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

APA (6th Edition):

Kohli, C. S. (1970). Stochastic Development of Dissolution Morphology. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/18476

Chicago Manual of Style (16th Edition):

Kohli, Charanjit Singh. “Stochastic Development of Dissolution Morphology.” 1970. Masters Thesis, McMaster University. Accessed February 22, 2019. http://hdl.handle.net/11375/18476.

MLA Handbook (7th Edition):

Kohli, Charanjit Singh. “Stochastic Development of Dissolution Morphology.” 1970. Web. 22 Feb 2019.

Vancouver:

Kohli CS. Stochastic Development of Dissolution Morphology. [Internet] [Masters thesis]. McMaster University; 1970. [cited 2019 Feb 22]. Available from: http://hdl.handle.net/11375/18476.

Council of Science Editors:

Kohli CS. Stochastic Development of Dissolution Morphology. [Masters Thesis]. McMaster University; 1970. Available from: http://hdl.handle.net/11375/18476

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