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Deformation Behavior of High Temperature Intermetallic TiAl Alloyed with Gallium

Published online by Cambridge University Press:  26 February 2011

B. Kad  and
B. F. Oliver
B. Kad
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, TN 37996-2200
B. F. Oliver
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, TN 37996-2200
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Abstract

TiAl (γ) intermetallic has been investigated with ternary additions of up to 10 at% Ga. Optical microscopy reveals that gallium can be retained in solution to at least 7 at%. Microhardness data reveals that Ga substituted for Al such that Ti/(Al+Ga)=l causes solution softening. Deformation behavior of the single phase alloy in compression is reported. Perfect dislocations of the a/2[110] type and superdislocations of the a[011] type and a/2[112] type have been observed. TEM results indicate that primary deformation is contributed by a/2[110] type dislocations and twinning on (111) planes with wavy slip optically observed

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 133: Symposium H – High-Temperature Ordered Intermetallic Alloys III , 1988 , 237
Copyright
Copyright © Materials Research Society 1989

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References

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