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Dislocations with Non-Planar Locked Structures in the L12 Ordered Alloys

Published online by Cambridge University Press:  26 February 2011

Y.Q. Sun ,
P.M. Hazzledine  and
M.A. Crimp
Y.Q. Sun
Affiliation:
Department of Materials, University of Oxford, United Kingdom.
P.M. Hazzledine
Affiliation:
Department of Materials, University of Oxford, United Kingdom.
M.A. Crimp
Affiliation:
Department of Materials, University of Oxford, United Kingdom.
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Abstract

In the L12 structure, the Kear-Wilsdorf lock on screw superdislocations is the best known example of a dislocation with a non-planar locked structure. Recent high resolution TEM work on Ni3Al and Ni3Ga has shown locked structures on the following dislocations: 30-degree <112>/3 super-Shockley partials, edge <110> {001} dislocations, and 45-degree <100>{001} dislocations. Dislocation reactions among intersecting <100>{001} and <110>{001} slip systems have also been found to form product dislocations with locked structures. This paper summarizes these locked structures and outlines their effects on the operation of related slip systems.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 213: Symposium Q – High-Temperature Ordered Intermetallic Alloys IV , 1990 , 311
Copyright
Copyright © Materials Research Society 1991

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References

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