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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Stiffness factors in material efficiency for automotive application

Ng, Wei Loong. January 2001 (has links)
Thesis (M.S.)--Mississippi State University. Department of Mechanical Engineering. / Title from title screen. Includes bibliographical references.
2

The effect of microstructure on cavitation during hot deformation in fine-grained AA5083 aluminum alloy sheet material

Chang, Jung-Kuei, 1975- 09 October 2012 (has links)
Aluminum alloys are of great interest to the automobile industry for vehicle mass reduction, which improves vehicle performance and reduces emissions. Hot forming processes, such as superplastic forming (SPF) and quick-plastic forming (QPF) have been developed to take advantage of the improved formability of certain aluminum materials at elevated temperature. Commercial fine-grained aluminum alloy AA5083 sheet is the most commonly used material in the SPF and QPF forming processes. Hot formability of AA5083 is often limited by material cavitation during forming, which makes understanding and controlling cavitation an issue of primary importance for improving hot sheet forming processes. The thermomechanical processing history of AA5083 can strongly affect superplastic performance, causing variations in formability between material lots. These variations are closely related to microstructure, and intermetallic particles are prime suspects for controlling cavitation behavior. However, there has been little more than anecdotal evidence available that these particles nucleate or influence cavitation. Interactions between intermetallic particles and cavities were, thus, analyzed using both two-dimensional (2-D) and three-dimensional (3-D) microstructure characterization techniques. Analysis of 3-D microstructures from AA5083 specimens deformed under conditions similar to the SPF and QPF processes provide conclusive proof that cavities form at specific types of intermetallic particles. Differences in cavitation between materials deformed under the SPF and QPF processes result from differences in deformation mechanisms. These differences are illustrated by the formation of filaments on fracture surfaces of superplastically deformed AA5083 specimens, which have been characterized. / text
3

Mechanical and microstructural characterization of commercial AA5083 aluminum alloys

Kulas, Mary-Anne 28 August 2008 (has links)
Not available / text
4

Conception et analyse mécaniques des pièces en aluminium pour application automobile /

Cai, Fanglin, January 2007 (has links)
Thèse (M.Eng.) -- Université du Québec à Chicoutimi, 2007. / La p. de t. porte en outre: Mémoire présenté à l'Université du Québec à Chicoutimi comme exigence partielle de la maîtrise en ingénierie. CaQCU Bibliogr.: f. 140-143. Document électronique également accessible en format PDF. CaQCU
5

The effect of microstructure on cavitation during hot deformation in fine-grained AA5083 aluminum alloy sheet material

Chang, Jung-Kuei, January 1900 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2008. / Vita. Includes bibliographical references.
6

Mechanical and microstructural characterization of commercial AA5083 aluminum alloys

Kulas, Mary-Anne, Taleff, Eric M. January 2004 (has links) (PDF)
Thesis (Ph. D.)--University of Texas at Austin, 2004. / Supervisor: Eric M. Taleff. Vita. Includes bibliographical references.
7

Weight reduction effects of material substitution on constant stiffness components

Li, Fang, January 2004 (has links)
Thesis (Ph.D.) -- Mississippi State University. Department of Mechanical Engineering. / Title from title screen. Includes bibliographical references.

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