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The Effect of Cobalt on Martensitic Toughening Parameters in NiAl

Published online by Cambridge University Press:  26 February 2011

Scott M. Russell ,
C. C. Law  and
M. J. Blackburn
Scott M. Russell
Affiliation:
Pratt & Whitney, 400 Main St., East Hartford, CT 06108.
C. C. Law
Affiliation:
Pratt & Whitney, 400 Main St., East Hartford, CT 06108.
M. J. Blackburn
Affiliation:
Pratt & Whitney, 400 Main St., East Hartford, CT 06108.
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Abstract

The martensitic transformation and the effect of cobalt additions on important martensitic toughening parameters are being studied as a means of toughening NiAl alloys. Cobalt additions to NiAl martensite are seen to lower the Ms temperature, reduce the transformation strain anisotropy, and reduce the transformation temperature hysteresis (an indicator of interfacial mobility). Optimization of these parameters should allow martensitic transformation toughening processes to aid in overcoming the ambient temperature brittleness of NiAl alloys.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 133: Symposium H – High-Temperature Ordered Intermetallic Alloys III , 1988 , 627
Copyright
Copyright © Materials Research Society 1989

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References

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