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A Mechanism for Magnetically Driven Shape Memory Alloys

Published online by Cambridge University Press:  15 February 2011

P. J. Ferreira  and
J. B. Vander Sande
P. J. Ferreira
Affiliation:
Massachusetts Institute of Technology Department of Materials Science and Engineering, Cambridge, MA, 01239, USA
J. B. Vander Sande
Affiliation:
Massachusetts Institute of Technology Department of Materials Science and Engineering, Cambridge, MA, 01239, USA
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Abstract

A mechanism for shape memory alloys driven by a magnetic field is proposed. The mechanism involves the motion of twin dislocations in response to the application of a magnetic field. As a consequence, twin variants oriented favorably with respect to the magnetic field direction will grow. The maximum pressure that can be exerted at the twin dislocations is when the magnetic field is at angle . The shape memory effect is significantly affected by the presence of impurities, second-phase particles and grain boundaries

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 604: Symposium LL – Materials for Smart Systems III , 1999 , 291
Copyright
Copyright © Materials Research Society 2000

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References

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