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Strain Aging behavior In NiAI Microalloyed with Interstitial and Substitutional Solutes

Published online by Cambridge University Press:  15 February 2011

M. L. Weaver
Affiliation:
Center for Nonlinear & Nonequilibrium Aeroscience, Florida A&M University, Tallahassee, FL 32306–4005
R. D. Noebe
Affiliation:
NASA-Lewis Research Center, Cleveland, OH 44135
M. J. Kaufman
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611
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Abstract

Dynamic strain aging has been investigated in polycrystalline NiAl alloys containing combined additions of interstitial and substitutional impurities. The results indicate that strain aging can be enhanced in polycrystalline alloys containing concentrations of silicon or iron in excess of 0.15 at.% in addition to conventional levels of carbon. This co-doping leads to very dramatic strain aging events, comparable to those typically observed in single crystals. This effect will be discussed with respect to conventional theories of strain aging.

Type
Research Article
Copyright
Copyright © Materials Research Society 1997

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