Masters Theses
Abstract
"Aluminum alloys have been widely used in many industrial fields, but their high temperature properties limit their usage in heat sensitive applications. Nanophase aluminum alloy, a novel group of aluminum alloys, exhibit good mechanical properties at ambient temperature. It is deemed a potential high strength material at elevated temperatures.
In this study, two groups of nanophase aluminum alloys, Al-Ti-Cu and Al-Mg, were investigated. The aims of the study were to establish: (a) chemical composition and microstructure, (b) mechanical property at different temperatures, (c) microstructure- mechanical property correlation and (d) strengthening mechanisms.
Mini-tensile specimens were used to determine mechanical properties. Tensile tests were operated in the temperature range of 20 °C to 376 °C, at initial strain rates of 7 x 10-5 to 1 x 10-2 s-1. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD) technique were used for microstructural studies.
The results show that the materials possess a good combination of strength and ductility at all test temperatures. The existence of very fine grain structure and nanometer size particles are responsible for excellent mechanical properties. Strengthening mechanisms are still not clear, and results do not follow the existing models"--Abstract, page iii.
Advisor(s)
Mishra, Rajiv S.
Committee Member(s)
Miller, F. Scott, 1956-
Dharani, Lokeswarappa R.
Department(s)
Materials Science and Engineering
Degree Name
M.S. in Metallurgical Engineering
Publisher
University of Missouri--Rolla
Publication Date
Fall 2002
Pagination
xi, 65 pages
Note about bibliography
Includes bibliographical references (pages 60-64).
Rights
© 2002 Jing Zheng, All rights reserved.
Document Type
Thesis - Restricted Access
File Type
text
Language
English
Subject Headings
Aluminum alloys -- Analysis
Thesis Number
T 8127
Print OCLC #
52578577
Link to Catalog Record
Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.
http://merlin.lib.umsystem.edu/record=b4968793~S5Recommended Citation
Zheng, Jing, "Microstructure and mechanical properties of nanophase aluminum alloys" (2002). Masters Theses. 2231.
https://scholarsmine.mst.edu/masters_theses/2231
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Comments
The funding provided by the Air Force Office of Scientific Research and materials provided by Rockwell Scientific Company and the Boeing Company are sincerely acknowledged.