SOME RESULTS IN NONLINEAR PHYSICS OF MARTENSITIC-TRANSFORMATION

Statistical thermodynamics of martensitic transformation is developed in the frame of the self-consistent field approximation. The accommoda tion mechanisms of the parent phase to the martensitic variant growth are described by the three order parameters. The latters reflect the c oncentration and the orientation of the martensitic phase and the disl ocation density at the interphase boundaries. Statistical model allowe d to explain the superelasticity and shape memory effects and to propo se the phenomenological description of deformation properties caused b y martensitic transformation. Taking into account the typical nonlinea rities for the order parameters given by statistical model. the wave n ature of the martensitic phase growth is analysed.