Troshchenko D. Nonequilibrium evolutionary thermodynamics of metals fragmentation with taking into account stochasticity

PhD thesis is devoted to the several aspects: (I) the theoretical description of the process of fragmentation of a metal structure subjected to severe plastic deformation, (II) the establishment of structural and kinetic phenomena peculiarities occurring in metals during processing, (III) the stability of the formed stationary states, (IV) the study of the influence of the additive fluctuations of the main parameters on the evolution process of structural defects. Processing conditions (the value of elastic strains), which significantly influence on the formation of stable submicrocrystalline or nanocrystalline structures, were established by results of study. The phase diagrams were constructed. It demonstrates various modes of fragmentation and allow to reflect the scenarios of behavior of structural defects in a general view during processing. It is shown that the obtained results are well explain and make it possible to predict the experimental data: the formation of a stable limiting structure with the desired grain size and high physical and mechanical properties.