Finite element assisted self-consistent simulations to capture texture heterogeneity during hot compression

Abstract

Abstract In the present work, finite element simulations were performed to capture the influence of friction and temperature gradient on the local strain distribution across the cross-section of a hot compressed specimen. The finite element predicted deformation histories for different regions of the hot compressed sample were exported to the viscoplastic self-consistent model to perform texture simulations in the variable velocity gradient mode and to capture the texture heterogeneity. Differences in texture intensity as well as characteristics were observed depending upon the distance from the central region of the hot compressed sample. It was observed that a double fiber texture with {110} and {100} parallel to the compression direction evolved in the central region of the specimen, which accommodates the highest amount of local plastic strain. On the other hand, only {110} fiber evolved in the region close to the dead zone, which accommodates the least amount of local plastic strain. Furthermore, volume fraction of the {100} fiber was observed to be sensitive towards strain rate sensitivity, where a higher rate sensitivity enhances the shear rates on the non-octahedral slip systems resulting in strengthening of {100} texture fiber.