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You searched for +publisher:"University of North Texas" +contributor:("Xia, Zhenhai, 1963-"). Showing records 1 – 3 of 3 total matches.

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University of North Texas

1. Xie, Wa. Surface Topography and Aesthetics of Recycled Cross-Linked Polyethylene Wire and Cable Coatings.

Degree: 2014, University of North Texas

Our research focuses on re-using a waste a material, cross-linked polyethylene abbreviated XLPE, which is a widely used coating for wires. XLPE is strong and has excellent thermal properties due to its chemical structure - what leads to the significance of recycling this valuable polymer. Properties of XLPE include good resistance to heat, resistance to chemical corrosion, and high impact strength. A wire is usually composed of a metal core conductor and polymeric coating layers. One creates a new coating, including little pieces of recycled XLPE in the lower layer adjacent to the wire, and virgin XLPE only in the upper layer. Industries are often wasting materials which might be useful. Mostly, some returned or excess products could be recycled to create a new type of product or enable the original use. This method helps cleaning the waste, lowers the costs, and enhances the income of the manufacturing company. With the changing of the thickness of the outer layer, the roughness changes significantly. Moreover, different processing methods result in surfaces that look differently. Advisors/Committee Members: Brostow, Witold, 1934-, Aouadi, Samir, Pahler, Ray, Xia, Zhenhai, 1963-.

Subjects/Keywords: recycling; surface roughness; crosslinked polyethylene (XLPE); coated wire; Electric cables  – Insulation  – Materials.; Coatings.; Polyethylene.; Plastics  – Recycling.; Crosslinked polymers.

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APA (6th Edition):

Xie, W. (2014). Surface Topography and Aesthetics of Recycled Cross-Linked Polyethylene Wire and Cable Coatings. (Thesis). University of North Texas. Retrieved from https://digital.library.unt.edu/ark:/67531/metadc799512/

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

Chicago Manual of Style (16th Edition):

Xie, Wa. “Surface Topography and Aesthetics of Recycled Cross-Linked Polyethylene Wire and Cable Coatings.” 2014. Thesis, University of North Texas. Accessed April 20, 2019. https://digital.library.unt.edu/ark:/67531/metadc799512/.

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

MLA Handbook (7th Edition):

Xie, Wa. “Surface Topography and Aesthetics of Recycled Cross-Linked Polyethylene Wire and Cable Coatings.” 2014. Web. 20 Apr 2019.

Vancouver:

Xie W. Surface Topography and Aesthetics of Recycled Cross-Linked Polyethylene Wire and Cable Coatings. [Internet] [Thesis]. University of North Texas; 2014. [cited 2019 Apr 20]. Available from: https://digital.library.unt.edu/ark:/67531/metadc799512/.

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

Council of Science Editors:

Xie W. Surface Topography and Aesthetics of Recycled Cross-Linked Polyethylene Wire and Cable Coatings. [Thesis]. University of North Texas; 2014. Available from: https://digital.library.unt.edu/ark:/67531/metadc799512/

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


University of North Texas

2. Veligatla, Medha. Glass Forming Ability, Magnetic Properties, and Mechanical Behavior of Iron-Based and Cobalt-Based Metallic Glasses.

Degree: 2014, University of North Texas

Lack of crystalline order and microstructural features such as grain/grain-boundary in metallic glasses results in a suite of remarkable attributes including very high strength, close to theoretical elasticity, high corrosion and wear resistance, and soft magnetic properties. In particular, low coercivity and high permeability of iron and cobalt based metallic glass compositions could potentially lead to extensive commercial use as magnetic heads, transformer cores, circuits and magnetic shields. In the current study, few metallic glass compositions were synthesized by systematically varying the iron and cobalt content. Thermal analysis was done and included the measurement of glass transition temperature, crystallization temperature, and the enthalpies of relaxation and crystallization. Magnetic properties of the alloys were determined including saturation magnetization, coercivity, and Curie temperature. The coercivity was found to decrease and the saturation magnetization was found to increase with the increase in iron content. The trend in thermal stability, thermodynamic properties, and magnetic properties was explained by atomic interactions between the ferromagnetic metals and the metalloids atoms in the amorphous alloys. Mechanical behavior of iron based metallic glasses was evaluated in bulk form as well as in the form of coatings. Iron based amorphous powder was subjected to high power mechanical milling and the structural changes were evaluated as a function of time. Using iron-based amorphous powder precursor, a uniform composite coating was achieved through microwave processing. The hardness, modulus, and wear behavior of the alloys were evaluated using nano-indentation. Advisors/Committee Members: Mukherje, Sundeep, Dahotre, Narendra B., Xia, Zhenhai, 1963-, Aouadi, Samir.

Subjects/Keywords: Iron-based; cobalt-based; metallic glasses; glass forming ability; magnetic properties; mechanical behavior; Metallic glasses  – Magnetic properties.; Metallic glasses  – Mechanical properties.; Glass.

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

APA (6th Edition):

Veligatla, M. (2014). Glass Forming Ability, Magnetic Properties, and Mechanical Behavior of Iron-Based and Cobalt-Based Metallic Glasses. (Thesis). University of North Texas. Retrieved from https://digital.library.unt.edu/ark:/67531/metadc699947/

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

Chicago Manual of Style (16th Edition):

Veligatla, Medha. “Glass Forming Ability, Magnetic Properties, and Mechanical Behavior of Iron-Based and Cobalt-Based Metallic Glasses.” 2014. Thesis, University of North Texas. Accessed April 20, 2019. https://digital.library.unt.edu/ark:/67531/metadc699947/.

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

MLA Handbook (7th Edition):

Veligatla, Medha. “Glass Forming Ability, Magnetic Properties, and Mechanical Behavior of Iron-Based and Cobalt-Based Metallic Glasses.” 2014. Web. 20 Apr 2019.

Vancouver:

Veligatla M. Glass Forming Ability, Magnetic Properties, and Mechanical Behavior of Iron-Based and Cobalt-Based Metallic Glasses. [Internet] [Thesis]. University of North Texas; 2014. [cited 2019 Apr 20]. Available from: https://digital.library.unt.edu/ark:/67531/metadc699947/.

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

Council of Science Editors:

Veligatla M. Glass Forming Ability, Magnetic Properties, and Mechanical Behavior of Iron-Based and Cobalt-Based Metallic Glasses. [Thesis]. University of North Texas; 2014. Available from: https://digital.library.unt.edu/ark:/67531/metadc699947/

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


University of North Texas

3. Yellakara, Ranga Nikhil. Computational Study of Dislocation Based Mechanisms in FCC Materials.

Degree: 2014, University of North Texas

Understanding the relationships between microstructures and properties of materials is a key to developing new materials with more suitable qualities or employing the appropriate materials in special uses. In the present world of material research, the main focus is on microstructural control to cost-effectively enhance properties and meet performance specifications. This present work is directed towards improving the fundamental understanding of the microscale deformation mechanisms and mechanical behavior of metallic alloys, particularly focusing on face centered cubic (FCC) structured metals through a unique computational methodology called three-dimensional dislocation dynamics (3D-DD). In these simulations, the equations of motion for dislocations are mathematically solved to determine the evolution and interaction of dislocations. Microstructure details and stress-strain curves are a direct observation in the simulation and can be used to validate experimental results. The effect of initial dislocation microstructure on the yield strength has been studied. It has been shown that dislocation density based crystal plasticity formulations only work when dislocation densities/numbers are sufficiently large so that a statistically accurate description of the microstructure can be obtainable. The evolution of the flow stress for grain sizes ranging from 0.5 to 10 µm under uniaxial tension was simulated using an improvised model by integrating dislocation pile-up mechanism at grain boundaries has been performed. This study showed that for a same initial dislocation density, the Hall–Petch relationship holds well at small grain sizes (0.5–2 µm), beyond which the yield strength remains constant as the grain size increases. Advisors/Committee Members: Wang, Zhiqiang, Mishra, Rajiv S., Reidy, Richard F., 1960-, Xia, Zhenhai, 1963-, Collins, Peter (Peter C.).

Subjects/Keywords: Mechanical behavior of materials; dislocation dynamics; FCC materials; Dislocations in metals.; Metals  – Microstructure.; Deformations (Mechanics)

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

APA (6th Edition):

Yellakara, R. N. (2014). Computational Study of Dislocation Based Mechanisms in FCC Materials. (Thesis). University of North Texas. Retrieved from https://digital.library.unt.edu/ark:/67531/metadc699921/

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

Chicago Manual of Style (16th Edition):

Yellakara, Ranga Nikhil. “Computational Study of Dislocation Based Mechanisms in FCC Materials.” 2014. Thesis, University of North Texas. Accessed April 20, 2019. https://digital.library.unt.edu/ark:/67531/metadc699921/.

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

MLA Handbook (7th Edition):

Yellakara, Ranga Nikhil. “Computational Study of Dislocation Based Mechanisms in FCC Materials.” 2014. Web. 20 Apr 2019.

Vancouver:

Yellakara RN. Computational Study of Dislocation Based Mechanisms in FCC Materials. [Internet] [Thesis]. University of North Texas; 2014. [cited 2019 Apr 20]. Available from: https://digital.library.unt.edu/ark:/67531/metadc699921/.

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

Council of Science Editors:

Yellakara RN. Computational Study of Dislocation Based Mechanisms in FCC Materials. [Thesis]. University of North Texas; 2014. Available from: https://digital.library.unt.edu/ark:/67531/metadc699921/

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

.