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First Principles Study of Phase Stability in The Al-Ti System

Published online by Cambridge University Press:  28 February 2011

M. Asta ,
M. Sluiter ,
Prabhakar P. Singh ,
D. de Fontaine ,
T. Hong  and
A.J. Freeman
M. Asta
Affiliation:
University of California, Dept. of Physics, Berkeley, CA 94720
M. Sluiter
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94550
Prabhakar P. Singh
Affiliation:
University of California, Dept. of Materials Science, Berkeley, CA 94720
D. de Fontaine
Affiliation:
University of California, Dept. of Materials Science, Berkeley, CA 94720
T. Hong
Affiliation:
Northwestern University, Dept. of Physics, Evanston, IL 60207
A.J. Freeman
Affiliation:
Northwestern University, Dept. of Physics, Evanston, IL 60207
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Abstract

Due to its technological importance, the Al-Ti system has received much attention lately. For example, TiAl3 (as well as TiAl) has a low density and very high elevatedtemperature strength. However, this compound forms in the tetragonal D022 structure which has low ductility. Recent studies [1,2] have tried to understand the role of tetragonal distortion and the effect of ternary additions [3] in stablizing the D022 relative to the L12.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 186: Symposium I – Alloy Phase Stability and Design , 1990 , 33
Copyright
Copyright © Materials Research Society 1991

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