Phase field approach to phase transformations, twinning, dislocations, and their interaction (INVITED)

Abstract eng:
Phase field approach to multivariant martensitic phase transformations, transformation between martensitic variants (twinning), dislocations, and their interaction is developed at large strains. Various important requirements to the thermodynamic potential are formulated and satisfied. Phase transformation, twinning, and dislocation nucleation criteria are obtained from the thermodynamic lattice instability conditions under 3D stress state. Kinematics of interaction between phase transformations (twinning) and dislocations takes into account inheritance of dislocations during direct and reverse transformations. A number of important problems are solved using finite element method, and various experimental phenomena are reproduced and interpreted.

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