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Some Unusual Properties of the Fine Structure of Dislocations in Ni3Al Deformed at High Temperature

Published online by Cambridge University Press:  22 February 2011

Patrick Veyssiére  and
J. A. Horton
Patrick Veyssiére
Affiliation:
LEM, CNRS-ONERA, BP 72, 92322 Chatillon Cedex, France
J. A. Horton
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, U.S.A.
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Abstract

In Ni3Al polycrystals deformed at 850°C and quenched rapidly, surface defects exhibit two kinds of behaviour. On the one hand, dislocation coupling by antiphase boundary (APB) and complex stacking fault (CSF) is of normal magnitude for this alloy composition. On the other hand, separations are dramatically decreased in both cases. A method to visualize antiphase boundaries using a weakly excited superlattice reflection is introduced.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 339
Copyright
Copyright © Materials Research Society 1995

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