3D finite element analysis of strain inhomogeneity in equal channel angular pressing of aluminum

Equal Channel Angular Pressing (ECAP) is widely being used to investigate the process of producing the ultra fine grained microstructure in metals and alloys. A sound knowledge of the plastic deformation and strain distribution is necessary for understanding the relationships between strain inhomogeneity and die geometry. Considerable research has been reported on finite element analysis of this process (ECAP). However, the two-dimensional models are not suitable due to the geometry of the dies, especially in cylindrical ones. In the present work, three dimensional simulations of ECAP process was carried out for two ECAP passes in cold condition, with channel angle of 120°, for strain hardening aluminum alloy cold deformation using DEFORM software. Strain inhomegenetity is presented and discussed for all cases. Stress distribution is presented and discussed for all cases. Dimension of the billet will be 5mm radius and 80 mm length. Stress, strain, displacements, velocities etc will be discussed here.