Progressive texture evolution during equal channel angular extrusion

Progressive texture evolution during the second pass of equal channel angular extrusion (ECAE) of copper via route BC was investigated by interrupting the extrusion and measuring the textures of seven sections starting within the entry channel, continuing through the die corner region, and ending within the exit channel. Experimental textures showed the development of {1 1 1} 〈 u   v   w 〉 θ and {h k l}〈1 1 0〉θ partial fibers; and that the most significant texture changes occurred near the die intersection plane. Consistent texture predictions were achieved by visco-plastic self-consistent modelling (VPSC) using finite element (FE)-predicted deformation history. The FE simulation from the center of the billet cross-section indicated that the deviation of ECAE deformation from simple shear at the intersection of the die channels was not significant.