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Stress Anisotropy of Stoichiometric Nial Single Crystals

Published online by Cambridge University Press:  01 January 1992

T. Takasugi ,
J. Kishino  and
S. Hanada
T. Takasugi
Affiliation:
Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-ku,Sendai 980, Japan.
J. Kishino
Affiliation:
Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-ku,Sendai 980, Japan.
S. Hanada
Affiliation:
Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-ku,Sendai 980, Japan.
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Abstract

The yield stress properties and the associated slip systems of stoichiometric NiAl single crystals were investigated in terms of crystal orientation, temperature and the deformation mode. The CRSS was, in a wide range of experimental conditions, higher in the sequence of {110}<100>, {100}<100> and {hk0}<100> slips. In all the crystal orientations studied, the CRSS in compression was higher than the CRSS in tension particularly at low temperatures. The tension-compression asymmetry on the CRSS was understood qualitatively as being due to the effect of the normal stress on the core structure of a <001> dislocation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 459
Copyright
Copyright © Materials Research Society 1995

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References

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