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The Effect of Room Temperature Prestrain on the Yield Stress of Single Crystals of γ’ in the Anomalous Regime

Published online by Cambridge University Press:  22 February 2011

S.S. Ezz  and
P.B. Hirsch
S.S. Ezz
Affiliation:
Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, U.K.
P.B. Hirsch
Affiliation:
Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, U.K.
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Abstract

The yield stress of a specimen prestrained at 294 K increases only slowly or is constant up to a temperature above which the yield stress of a virgin specimen is greater. Above that temperature, the yield stress tends to increase as for a virgin crystal. For sufficiently high prestresses, the yield stress anomaly disappears completely. The results are interpreted in terms of a model in which the operation of Frank-Read sources is rate controlling.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 719
Copyright
Copyright © Materials Research Society 1995

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