A phase field modelling for multi-scale deformation mechanics of poly crystalline metals

摘要

A phase field modelling to clarify the multi-scale deformation mechanism of polycrystalline metals was undertaken. Modified coupling equations between the phase and stress/strain using a multiphase field model were introduced, and solved numerically under typical test-case conditions. The grain growth process was simulated first, and the microscopic stress distribution was calculated. The microstructural morphology was drastically affected by the stress dependency. The relationship between macroscopic loading and microstructure was then verified by a tensile test. Microstructural rearrangement was induced by macroscopic deformation, and we conclude that the present model is effective for further investigation into the multi-scale deformation mechanics.