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Engineering Considerations in the Application of NiTiHf and NiAI as Practical High-Temperature Shape Memory Alloys

Published online by Cambridge University Press:  16 February 2011

Scott M. Russell  and
Frank Sczerzenie
Scott M. Russell
Affiliation:
Special Metals Corporation, 4317 Middle Settlement Road, New Hartford, NY 13413
Frank Sczerzenie
Affiliation:
Special Metals Corporation, 4317 Middle Settlement Road, New Hartford, NY 13413
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Abstract

NiTiHf and NiAI have shown the potential for development as high temperature shape memory alloys with transformation temperatures of 150°C or higher. However, various engineering considerations must be addressed before these systems can be used as practical high temperature shape memory alloys. These considerations include: fabricability, phase stability, mechanical stability, and cost. NiTiHf is attractive from a cost standpoint, although its fabricability must still be demonstrated on larger heats of material. The phase stability and mechanical stability of NiTiHf are unknown. NiAl requires great improvements in both fabricability and phase stability. The mechanical stability and costs for producing NiAI shape memory alloys are still unclear.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 360 , 1994 , 455
Copyright
Copyright © Materials Research Society 1995

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