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Dislocation Behaviour in the Octahedral Plane in Ni3Ga Single Crystals

Published online by Cambridge University Press:  26 February 2011

A. Couret ,
Y. Sun  and
P.M. Hazzledine
A. Couret
Affiliation:
Cemes-Loe/Cnrs 29, rue J. Marvig, BP 4347, 31055 Toulouse Cedex, France
Y. Sun
Affiliation:
Department of Materials, Univ. of Oxford Parks Road,Oxford OXI 3PH England
P.M. Hazzledine
Affiliation:
Cemes-Loe/Cnrs 29, rue J. Marvig, BP 4347, 31055 Toulouse Cedex, France
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Abstract

Weak beam electron microscopy has been used to study the substructure in octahedral planes in Ni3Ga deformed in the range of the yield stress anomaly. The substructure is formed by screw dislocations in the Kear Wilsdorf configuration, which contain numerous superkinks. A statistical analysis of the superkink height has been performed. The effect of a first high temperature deformation on a second low temperature one has been investigated. The behaviour of the dislocations has been deduced from these experimental results and from those of the literature.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 213: Symposium Q – High-Temperature Ordered Intermetallic Alloys IV , 1990 , 317
Copyright
Copyright © Materials Research Society 1991

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References

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