Investigation of the Effect of Channel Angle and Outer Corner Radius in Equal Channel Angular Pressing (ECAP) Process

— Equal channel angular pressing (ECAP) is one of an effective process technique that is widely used to get fine grained microstructures in metal and alloys with retaining of billet cross-section. In the present study, finite element methods (FEM) performed using ABAQUS software to investigate the effect of die geometry and ECAP process parameters on pressing force and equivalent plastic strain (PEEQ). The results confirm a significant effect of die geometry and coefficient of friction on pressing force and equivalent plastic strain in such a manner; as outer corner radius and channel angle increase, the pressing force and equivalent plastic strain decrease. While when the friction coefficient increases, both of pressing force and equivalent plastic strain increase. On the other hand, the corner cap decreases with increasing the friction of coefficient. Keywords— Equal channel