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Dissociation Processes in the Orthorhombic O Phase

Published online by Cambridge University Press:  01 January 1992

Joel Douin ,
Shigehisa Naka  and
Marc Thomas
Joel Douin
Affiliation:
LEM, CNRS/ONERA, 29, avenue de la division Leclerc, BP 72, 92332 Chatillon Cedex, France
Shigehisa Naka
Affiliation:
OM, ONERA, 29, avenue de la division Leclerc, BP 72, 92332 Chatillon Cedex, France
Marc Thomas
Affiliation:
OM, ONERA, 29, avenue de la division Leclerc, BP 72, 92332 Chatillon Cedex, France
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Abstract

In the orthorhombic phase of Ti2AlNb-type, the occurrence of different dissociation modes of dislocations, glissile in the (001) basal plane is reported. [100] and 1/2[110] dislocations usually dissociate in order to form antiphase boundaries. Detailed weak-beam observations show that [100] dislocations, as well as [010] dislocations formed by interaction of 1/2<110> dislocations, can dissociate into three-fold configurations containing a pair of stacking faults.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 317
Copyright
Copyright © Materials Research Society 1995

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References

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