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A New Interpretation of Stress Relaxations in Ni3(Al,Hf) Single Crystals.

Published online by Cambridge University Press:  22 February 2011

J. Bonneville ,
P. Spätig  and
J.-L. Martin
J. Bonneville
Affiliation:
Ecole Polytechnique Fédérate de Lausanne, Institut de Génie Atomique, Département de Physique, 1015 Lausanne, (Switzerland).
P. Spätig
Affiliation:
Ecole Polytechnique Fédérate de Lausanne, Institut de Génie Atomique, Département de Physique, 1015 Lausanne, (Switzerland).
J.-L. Martin
Affiliation:
Ecole Polytechnique Fédérate de Lausanne, Institut de Génie Atomique, Département de Physique, 1015 Lausanne, (Switzerland).
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Abstract

A technique of repeated stress relaxations is used to characterise the strain hardening rate (K) and the mobile dislocation density (ρm) in the flow strength anomaly domain of Ni3(Al,Hf) single crystals. It is shown that there is no independent means for measuring both effects but that reasonable assumptions about the strain hardening rate lead to determine the variation of ρm during relaxation. Preliminary results indicate that during relaxation ρm decreases more rapidly with strain (stress) when the temperature is raised.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 369
Copyright
Copyright © Materials Research Society 1995

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