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Slip System Modification in NiAl

Published online by Cambridge University Press:  26 February 2011

D. B. Miracle ,
S. Russell  and
C. C. Law
D. B. Miracle
Affiliation:
AFWAL/MLLM, Wright-Patterson AFB, OH 45433
S. Russell
Affiliation:
AFWAL/MLLM, Wright-Patterson AFB, OH 45433
C. C. Law
Affiliation:
Pratt and Whitney Aircraft, East Hartford, CT 06108
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Abstract

An effort to modify the slip vector in the B2 compound NiAl was undertaken to overcome the brittle failure associated with the <100> slip vector which typically operates in this compound. Alloying additions were made to reduce the ordering energy of NiAl, and hence to promote <111> slip. Preliminary indications showed that Cr and Mn were effective in producing <111> slip in polycrystalline NiAl tested at room temperature. Two-surface slip trace analyses and TEM g·b analyses performed on aligned crystals of NiAl showed that <111> dislocations operate on either { 110} or {112} slip planes. However, the slip vector at 660°C was seen to revert to <100>, which operates on both {100} and {110} planes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 133: Symposium H – High-Temperature Ordered Intermetallic Alloys III , 1988 , 225
Copyright
Copyright © Materials Research Society 1989

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References

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