"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.
Mishra, Rajiv S.
Miller, F. Scott, 1956-
Dharani, Lokeswarappa R.
Materials Science and Engineering
M.S. in Metallurgical Engineering
University of Missouri--Rolla
xi, 65 pages
© 2002 Jing Zheng, All rights reserved.
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Aluminum alloys -- Analysis
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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~S5
Zheng, Jing, "Microstructure and mechanical properties of nanophase aluminum alloys" (2002). Masters Theses. 2231.
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