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Mechanical Properties of a β Containing Ti-Al-Cr-Alloy at Ambient and Elevated Temperatures

Published online by Cambridge University Press:  22 February 2011

W. R. Chen ,
J. Wang ,
B. Zhang ,
X. Wan  and
W. J. Chen
W. R. Chen
Affiliation:
Shanghai University of Technology, The Institute of Materials Science 149 Yanchang Road, Shanghai 200072, P. R. China
J. Wang
Affiliation:
Shanghai University of Technology, The Institute of Materials Science 149 Yanchang Road, Shanghai 200072, P. R. China
B. Zhang
Affiliation:
Shanghai University of Technology, The Institute of Materials Science 149 Yanchang Road, Shanghai 200072, P. R. China
X. Wan
Affiliation:
Shanghai University of Technology, The Institute of Materials Science 149 Yanchang Road, Shanghai 200072, P. R. China
W. J. Chen
Affiliation:
Shanghai University of Technology, The Institute of Materials Science 149 Yanchang Road, Shanghai 200072, P. R. China
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Abstract

The mechanical properties of a β-containing Ti-Al-Cr alloy were investigated at ambient and elevated temperatures. The results show that the Ti-Al-Cr alloy containing the β phase has a very high tensile strength but a poor ductility at ambient temperature, and that higher ductility is obtained at high temperatures. The temperature dependence of mechanical properties is found to be sensitive to the strain rate during the test. Fractography shows that the fracture mode changes from fully brittle to ductile-brittle mixture with the increased temperature. All the results suggest that the triple-phased TiAl alloys (α2+β+γ) may have the combined mechanical properties of the dual-phased T13Al ((α2+β) and dual-phased TiAl (α2+γ) alloys.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 1017
Copyright
Copyright © Materials Research Society 1995

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