Richards, A. W. and Lebensohn, R. A. and Bhattacharya, K. (2013) Interplay of martensitic phase transformation and plastic slip in polycrystals. Acta Materialia, 61 (12). pp. 4384-4397. ISSN 1359-6454. http://resolver.caltech.edu/CaltechAUTHORS:20130802-100002122
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We study the interplay between martensitic phase transformation and plastic slip in polycrystalline media. The work is motivated by the phenomenon of superelasticity – the ability of the material to recover strains beyond their apparent elastic limit – observed in shape-memory alloys. Often the recovery is not perfect with residual strain after a deformation and recovery cycle, and the stress–strain curve changes with cycling. We develop a mesoscale model at the single crystal level, and use it to study polycrystals. The model is able to reproduce various observations and provide important insight into the interplay. In particular, we show that transformation and plasticity can occur synergistically, with plasticity providing a mechanism for bridging across poorly oriented and thus non-transforming grains.
|Additional Information:||© 2013 Acta Materialia Inc. Published by Elsevier Ltd. Received 18 December 2012; received in revised form 27 March 2013; accepted 30 March 2013. Available online 18 May 2013. This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-FC52-08NA28613 (A.W.R. and K.B.).|
|Subject Keywords:||Phase transformation; Plasticity; Polycrystals|
|Official Citation:||A.W. Richards, R.A. Lebensohn, K. Bhattacharya, Interplay of martensitic phase transformation and plastic slip in polycrystals, Acta Materialia, Volume 61, Issue 12, July 2013, Pages 4384-4397, ISSN 1359-6454, http://dx.doi.org/10.1016/j.actamat.2013.03.053|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||05 Aug 2013 23:32|
|Last Modified:||25 Aug 2015 20:58|
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