圧延誘起加工組織に起因する力学的異方性を再現する結晶塑性シミュレーション

This study develops a crystal plasticity finite element (FE) simulation method that reproduces mechanical anisotropy caused by the microstructure of rolled materials, such as crystal orientation and dislocation distributions. The degree of orientation is defined to quantitatively evaluate the rolled microstructure’s orientation. Simulations assuming rolling are performed to map the resolved shear stress (RSS) to the increase in dislocation density. RSS estimated by the crystal orientation information and processing conditions predicts the dislocation density corresponding to the crystal orientation. Crystal plasticity FE simulations are performed considering the dislocation density distribution for each slip system and the rolling texture based on the orientation degree. The usefulness of this method is verified by comparing the results with those of conventional analysis methods.