Recently, grain refinement and grain misorientation have been experimentally studied for various materials with ultra-fine grained microstructures, which are achieved by the multi-pass cold rolling process. A numerical framework is developed to model the evolution of grain size and grain misorientation based on a dislocation density-based material model. Novel finite element models embedded with the dislocation density-based material subroutine are developed to model the plastic deformation and microstructural evolution during the multi-pass cold rolling process.
Figure 1. Deformation and dislocation fields predicted in pass-3 cold rolling of CP Ti.
Figure 2. Schematics of one pass cold rolling. RD: rolling direction; ND: normal direction.