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Development of NiAI(B2)-Base Shape Memory Alloys

Published online by Cambridge University Press:  16 February 2011

R. Kainuma ,
N. Ono  and
K. Ishida
R. Kainuma
Affiliation:
Department of Materials Science, and Department of Machine Intelligence and Systems Engineering, Faculty of Engineering, Tohoku University, Sendai 980-77, Japan
N. Ono
Affiliation:
Department of Machine Intelligence and Systems Engineering, Faculty of Engineering, Tohoku University, Sendai 980-77, Japan
K. Ishida
Affiliation:
Department of Materials Science, and Department of Machine Intelligence and Systems Engineering, Faculty of Engineering, Tohoku University, Sendai 980-77, Japan
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Abstract

The basic concept underlying the alloy design and microstructural control method utilised in developing a new type of β(B2)+ γ (A1) two-phase ductile shape memory alloy in the Ni-Al base systems is briefly reviewed. The characteristic features of the shape memory effect (SME) in the Ni-Al-Fe and Ni-Al-Fe-Mn alloys are reported with particular reference to the transformation and deformation temperatures, the volume fractions of the γ phase, the morphology of the β + γ structure and the effect of cycling. Training by cycling treatment has a significant effect on the degree of shape recovery and pseudo-elasticity in the β + γ two-phase alloys. These duplex β + γ alloys also exhibit a combination of relatively high damping capacity and high yield strength. It is emphasized that these alloys could be expected to fill the need for a new group of shape memory alloys which operate at elevated temperatures over 100°C.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 360 , 1994 , 467
Copyright
Copyright © Materials Research Society 1995

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