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Symmetry, texture and the recoverable strain of shape-memory polycrystals

Bhattacharya, K. and Kohn, R. V. (1996) Symmetry, texture and the recoverable strain of shape-memory polycrystals. Acta Materialia, 44 (2). pp. 529-542. ISSN 1359-6454. doi:10.1016/1359-6454(95)00198-0.

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Shape-memory behavior is the ability of certain materials to recover, on heating, apparently plastic deformation sustained below a critical temperature. Some materials have good shape-memory behavior as single crystals but little or none as polycrystals, while others display good shape-memory behavior even as polycrystals. In this paper, we propose a theoretical explanation for this difference: we show that the recoverable strain in a polycrystal depends on the texture of the polycrystal, the transformation strain of the underlying martensitic transformation and especially on the change of symmetry during the underlying transformation. Roughly, we find that the greater the change in symmetry during transformation, the greater the recoverable strain. We include an extensive survey of the experimental literature and show that our results agree with these observations. We make recommendations for improved shape-memory effect in polycrystals.

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Bhattacharya, K.0000-0003-2908-5469
Additional Information:© 1996 Published by Elsevier Ltd. Acta Metallurgica Inc. Received 13 February 1995; in revised form 13 April 1995. Some of this research was conducted while KB held a post-doctoral position at the Courant Institute. This work was partially supported by grants from the ARO (KB and RVK), NSF (KB and RVK), ONR (KB) and the Powell Foundation (KB).
Funding AgencyGrant Number
Army Research Office (ARO)UNSPECIFIED
Office of Naval Research (ONR)UNSPECIFIED
Charles Lee Powell FoundationUNSPECIFIED
Issue or Number:2
Record Number:CaltechAUTHORS:20160126-133506833
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Official Citation:K. Bhattacharya, R.V. Kohn, Symmetry, texture and the recoverable strain of shape-memory polycrystals, Acta Materialia, Volume 44, Issue 2, February 1996, Pages 529-542, ISSN 1359-6454, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:63979
Deposited By: Ruth Sustaita
Deposited On:26 Jan 2016 21:54
Last Modified:10 Nov 2021 23:24

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