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Phase Stability of Sigma + Beta Microstructures in the Ternary Nb-Ti-Al System

Published online by Cambridge University Press:  21 February 2011

D. T. Hoelzer  and
F. Ebrahimi
D. T. Hoelzer
Affiliation:
Dept. of Materials Science and Engineering, University of Florida, Gainesville, FL 32611
F. Ebrahimi
Affiliation:
Dept. of Materials Science and Engineering, University of Florida, Gainesville, FL 32611
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Abstract

An alloy with the nominal composition 42Nb-28Ti-30Al (at.%) was heat treated in the sigma + beta phase region. The evolution of σ phase from the metastable β phase and the stability of the two-phase microstructure at various aging temperatures were evaluated using TEM techniques. The results indicate that the β phase in equilibrium with the σ phase at high temperatures decomposes to the orthorhombic phase at temperatures below 1200°C.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 194: Symposium R – Intermetallic Matrix Composites I , 1990 , 393
Copyright
Copyright © Materials Research Society 1990

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