Journal
ACTA MATERIALIA
Volume 49, Issue 10, Pages 1847-1857Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S1359-6454(01)00075-1
Keywords
dislocations (theory); phase transformations (martensite/shear); theory & modeling (structural behavior); computer simulation
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The first Phase Field model of evolution of a multi-dislocation system in elastically anisotropic crystal under applied stress is formulated. The model is a modification and extension of our Phase Field Microelasticity approach to the theory of coherent phase transformations. The long-range strain-induced interaction of individual dislocations is calculated exactly and is explicitly incorporated in the Phase Field formalism. It also automatically takes into account the effects of short-range interactions, such as multiplication and annihilation of dislocations and a formation of various metastable microstructures involving dislocations and defects. The proposed 3-dimensional Phase Field model of dislocations does not impose a priori constraints on possible dislocation structures or their evolution paths. Examples of simulation of the FCC 3D system under applied stress are considered. (C) 2001 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.
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