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Stress-Induced Martensite in NiTi Corrugated Films

Published online by Cambridge University Press:  15 February 2011

Manfred Wuttig ,
J. S. Slutsker ,
Kiyotaka Mori  and
Jiang Li
Manfred Wuttig
Affiliation:
Department of Materials Science and Engineering University of Maryland, College Park, MD, 20742-2115, USA
J. S. Slutsker
Affiliation:
Department of Materials Science and Engineering University of Maryland, College Park, MD, 20742-2115, USA
Kiyotaka Mori
Affiliation:
Department of Materials Science and Engineering University of Maryland, College Park, MD, 20742-2115, USA
Jiang Li
Affiliation:
Department of Materials Science and Engineering University of Maryland, College Park, MD, 20742-2115, USA
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Abstract

Films deposited on corrugated surfaces develop non-uniform stresses when cooled from the deposition temperature. A disclination model shows that the stresses have rhombohedral and tetragonal components which can preferentially stress induce the martensite variants. The deflection of NiTi/Si bimorphs caused by the formation of martensite should thus be different if the NiTi/Si interface is corrugated or not. Experimental results confirm this expectation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 604: Symposium LL – Materials for Smart Systems III , 1999 , 105
Copyright
Copyright © Materials Research Society 2000

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