Finite element analysis on microscopic martensitic transformation of cubic system polycrystal

We start with shear mechanism of martensitic transformation, consider of a change of transformation volume, define mechanical energy of drive and equivalent stress, and on the premise of suppose microscopic chemical energy of drive is uniformity, we establish a model of dynamics of microscopic. On the base of this model, carried secondary development of Marc, Simulation on martensitic transformation couppling stress of e-plastic cubic system polycrystal under uniaxial extension. Every unit of the model on behalf of a grain with randomly distributed material main spindle, we take the single parameter Hill yield criterion of cubic system polycrystal, and choose exponent model between microscopic transformation rate and equivalent stress of driver. Three samples of polycrystal shown: 1) the distribution of microscopic phase transformation rate is non-uniform in polycrystal, the rate is uniformity by steps; 2) the average macroscopic phase rate curve of polycrystal is a exponent tendency, and lower microscopic model curve during the whole load process.