| The paper deals with the modeling of vacancy kinetics in nanocrystalline alloys at the thermo-mechanical loading, including cyclic tensile stress and temperature. The evolution of vacancy system determines the durability of nanostructed two-phase alloys. The vacancy kinetics is determined by the diffusion equation, considering the diffusion and thermal tensions. The excess vacancy density and the total tensions are determined. The expressions for the characteristic vacancy lifetime and the chemical potential of vacancy are obtained. The system of equations for the inhomogeneous vacancy concentration at the one-dimension task solved by numerical methods is obtained. The excess vacancy density leads to the formation of vacancy clusters. |
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