Multiscales modeling of microstructure evolution during asymmetric cold rolling process

A micromechanical ductile fracture model extended to take into account thermal heating due to mechanical dissipation within the metal is used to study a 3D-asymmetric cold rolling operation. The void coalescence mechanism by internal necking is also considered by using a modified Thomason’s criteria. The described formulation is implemented into ABAQUS/Explicit finite element package using the Aravas’s schemes. The presented model is applied to simulate the microstructure evolution of a A1050P aluminum with the variation of roll radius and roll speed ratios. The confrontation with available experimental results shows the capability of the constitutive law to predict the rolling force variation for different reductions. The results show also that optimums parameters could be found in order to reduce the rolling force and that rolling parameters exert an influence on the final microstructure of the rolled metal.