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The Effects of Interstitial Content and Annealing on the Flow and Fracture behavior of Polycrystalline ÿ-NiAl

Published online by Cambridge University Press:  22 February 2011

M. L. Weaver ,
V. Levit ,
M. J. Kaufman  and
R. D. Noebe
M. L. Weaver
Affiliation:
University of Florida, Gainesville, FL 32611–2066
V. Levit
Affiliation:
University of Florida, Gainesville, FL 32611–2066
M. J. Kaufman
Affiliation:
University of Florida, Gainesville, FL 32611–2066
R. D. Noebe
Affiliation:
NASA-Lewis Research Center, Cleveland, OH 44135–3191
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Abstract

The strain aging behavior of three polycrystalline NiAl alloys has been investigated at temperatures between 300 and 1200 K. Yield stress plateaus, yield stress transients upon a tenfold increase in strain rate, work hardening peaks, and dips in the strain rate sensitivity (SRS) have been observed between 700 and 800 K. These observations are indicative of dynamic strain aging (DSA) and are discussed in terms of conventional strain aging theories.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 425
Copyright
Copyright © Materials Research Society 1995

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