Journal
PHYSICS LETTERS A
Volume 343, Issue 1-3, Pages 32-39Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physleta.2005.05.034
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Using the second law of thermodynamics, a criterion for the instability of a crystal lattice with respect to a change in order parameters is derived for finite strains and lattice rotations. An explicit relation for lattice rotation is derived. A Gibbs (Landau) potential describing martensitic phase transformations, twinning, and dislocation nucleation is derived for a prescribed nonsymmetric nominal stress tensor and small elastic strain, but finite transformation strain and rotations. The equilibrium and transformation conditions are obtained. Martensitic phase transformations in NiAl, BN and C are analyzed and the importance of finite-strain corrections is demonstrated. (c) 2005 Elsevier B.V. All rights reserved.
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