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Phase Equilibria and Solidification of Al-Rich Ai-Ui-Cu Alloys

Published online by Cambridge University Press:  28 February 2011

Sinn-Wen Chen  and
Y. Austin Chang
Sinn-Wen Chen
Affiliation:
Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI 53706
Y. Austin Chang
Affiliation:
Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI 53706
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Abstract

A liquidus projection of the Al-rich Al-Li-Cu system is proposed. The proposed liquidus projection was based on DTA, X-ray diffraction, metallography, EPMA, SEM, and chemical analysis of 50 ternary alloys. Using these data and those reported in the literature, and thermodynamic models of Al-Li, AI-Cu and Cu-Li, a thermodynamic description of the Al-rich AI-Li-Cu system was developed. The calculated isothermal sections at several temperatures and the liquidus projection are in agreement with the experimental determinations. Combining the thermodynamic models and a Scheil-type equation, quantitative solidification paths were described. The calculated amount of primary solidification phase was compared to the experimental determination.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 186: Symposium I – Alloy Phase Stability and Design , 1990 , 141
Copyright
Copyright © Materials Research Society 1991

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