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Alloy Modeling and Experimental Correlation for Ductility Enhancement in NiAl

Published online by Cambridge University Press:  26 February 2011

R. Darolia ,
D. F. Lahrman ,
R. D. Field  and
A. J. Freeman
R. Darolia
Affiliation:
GE Aircraft Engines, 1 Neumann Way, Cincinnati, Ohio 45215
D. F. Lahrman
Affiliation:
GE Aircraft Engines, 1 Neumann Way, Cincinnati, Ohio 45215
R. D. Field
Affiliation:
GE Aircraft Engines, 1 Neumann Way, Cincinnati, Ohio 45215
A. J. Freeman
Affiliation:
Physics & Astronomy Department, Northwestern University, Evanston, Illinois 60201
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Abstract

Single crystals of stoichiometric NiAl and NiAl+V alloys were tested in compression and tension from room temperature to 871°C to determine deformation behavior. The dislocations were predominately <100> in the plastically deformed specimens. Attempts to ductilize NiAl by the addition of vanadium are described. The lowering of the anti-phase boundary energy by vanadium addition to NiAl, believed to promote the formation of <111> dislocations, was predicted by the all electron self consistent total electron band structure calculations. The vanadium additions caused considerable solid solution strengthening in NiAl, rendering the ternary alloys more brittle than stoichiometric NiAl.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 133: Symposium H – High-Temperature Ordered Intermetallic Alloys III , 1988 , 113
Copyright
Copyright © Materials Research Society 1989

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References

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