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On APB Dragging and APB Energy Anisotropy in Binary Ni3Al

Published online by Cambridge University Press:  26 February 2011

Dennis M. Dimiduk ,
J. C. Williams  and
A. W. Thompson
Dennis M. Dimiduk
Affiliation:
AFWAL Materials Laboratory, Wright-Patterson AFB, OH 45433-6533
J. C. Williams
Affiliation:
Engineering Materials and Technology Laboratory, General Electric Co., One Neuman Way, Cincinnati, OH 45215-6301
A. W. Thompson
Affiliation:
Carnegie-Mellon University, Department of Metallurgical Engineering and Materials Science, Pittsburgh, PA 15213-3890
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Abstract

Recent weak-beam electron microscopic studies of Ni3Al provided evidence indicating that glide of Kear-Wilsdorf locked dislocation segments may occur on {111} planes, accompanied by APB dragging, during deformation at high temperature. A direct implication of those studies is that a mechanism other than the onset of {010} slip may be important in controlling the peak in yield strength in Ni3Al. The present weak-beam investigations of Ni3Al have centered on the possibility that such configurations result from thermally induced dislocation kink and jog activity rather than the APB dragging mechanism. previously proposed.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 133: Symposium H – High-Temperature Ordered Intermetallic Alloys III , 1988 , 467
Copyright
Copyright © Materials Research Society 1989

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References

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