Kosogor A. The thermodynamic theory of stabilizing and destabilizing processes of martensitic phases in shape memory alloys

The dissertation thesis develops the symmetry-conforming thermodynamic theory for the description of interplay between the symmetry of the deformable crystal lattice and the configuration of crystallographic defects in martensitic alloys. For this purpose, the multi-component order parameter describing the slow reconfiguration of defects after the deformation of crystal lattice has been introduced within the framework of the Landau theory of martensitic transformations. Two different processes, namely i) the stabilization of martensitic phase during martensite aging and ii) the destabilization of martensitic phase caused by cyclic thermally-induced and stress-induced martensitic transformations have been described using the internal stress conception.