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Metals 2013, 3(3), 237-282; doi:10.3390/met3030237

Transformation Volume Effects on Shape Memory Alloys

1,2,* , 3,4
1 BCMaterials, University of the Basque Country (UPV/EHU), Bilbao 48080, Spain 2 Ikerbasque, Basque Foundation for Science, Bilbao 48011, Spain 3 Department of Radiophysics, Taras Shevchenko University, Glushkov Str. 2, build. 5, Kyiv 01601, Ukraine 4 Institute of Magnetism, 36-b Vernadsky Blvd, Kyiv 03142, Ukraine 5 Department of Physics, University of Balearic Islands, Ctra. de Valldemossa, km 7.5, Palma de Mallorca 07122, Spain
* Author to whom correspondence should be addressed.
Received: 1 April 2013 / Revised: 12 June 2013 / Accepted: 13 June 2013 / Published: 2 July 2013
(This article belongs to the Special Issue Shape Memory Alloys)
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It is generally accepted that the martensitic transformations (MTs) in the shape memory alloys (SMAs) are mainly characterized by the shear deformation of the crystal lattice that arises in the course of MT, while a comparatively small volume change during MT is considered as the secondary effect, which can be disregarded when the basic characteristics of MTs and functional properties of SMAs are analyzed. This point of view is a subject to change nowadays due to the new experimental and theoretical findings. The present article elucidates (i) the newly observed physical phenomena in different SMAs in their relation to the volume effect of MT; (ii) the theoretical analysis of the aforementioned volume-related phenomena.
Keywords: shape memory alloy; volume change; elastic modulus; crystal defects; martensite stabilization; entropy change shape memory alloy; volume change; elastic modulus; crystal defects; martensite stabilization; entropy change
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Chernenko, V.A.; L'vov, V.A.; Cesari, E.; Kosogor, A.; Barandiaran, J.M. Transformation Volume Effects on Shape Memory Alloys. Metals 2013, 3, 237-282.

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