動的再結晶を考慮したマルチスケール結晶塑性有限要素法によるAl合金板材の熱間圧延パラメータ最適化

抄録

In the hot rolling process of Al alloy sheet metal, plastic deformation-induced texture evolution and recrystallization due to thermal loading occur simultaneously. In this study, an optimization condition for hot rolling of A6022 sheet is obtained by using two-scale finite element (FE) analysis code based on the thermo-coupled elastic-crystalline plasticity constitutive law and the dynamic-explicit FE procedure. To improve the formability that maximizes the Lankford value (r-value), the rolling temperature and the rolling speed ratio are obtained by the response surface method.