Finite element simulation of ECAP with back pressure and investigation on the replacement with die having inclined top surface

Equal channel angular pressing (ECAP) is the most promising and effective method of severe plastic deformation thechniqus. In addition, materials with low doctility show severe cracking during ECAP and back pressure has been used in some research to overcome this problem. In this paper finite element has been used for simulation of ECAP with back pressure and the possibility of using ECAP die with inclined upper channel wall instead of back pressure. Results show that inclined up channel wall with 10 mm length and 5 degree inclination needs lower pressing foece and exert 100Mpa pressure on upeer side of sample. Therefore, die with inclination is suitable substitude for ECAP whith back pressure.