Healing of fatigue damage in NiTi shape memory alloys

Wagner, MF-X and Nayan, N and Ramamurty, U (2008) Healing of fatigue damage in NiTi shape memory alloys. In: Journal of Physics D: Applied Physics, 41 (18). 185408-1-185408-4.

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Abstract

Progressive accumulation of stress-induced martensite during cyclic loading of NiTi shape memory alloys results in both structural and functional fatigue. We present experimental data demonstrating that periodic annealing of the fatigued samples above the austenite finish temperature ('healing') retransforms the residual martensite back into the parent phase, and therefore enhances the fatigue life (stress-controlled testing, structural fatigue) or partly reverses the changes in the pseudo-elastic hysteresis (strain-controlled testing, functional fatigue).

Item Type:	Journal Article
Publication:	Journal of Physics D: Applied Physics
Publisher:	Institute of Physics
Additional Information:	Copyright of this article belongs to Institute of Physics.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	18 Oct 2008 14:04
Last Modified:	19 Sep 2010 04:51
URI:	http://eprints.iisc.ac.in/id/eprint/16137

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