DISTRIBUTION NON-UNIFORMITY OF THE ACCUMULATED PLASTIC STRAIN AT 3D SIMULATION OF SINGLE AND MULTI-ANGLED ECAE PROCESSES USING A MOVABLE RAM-DIE

Four virtual schemes for realizing the Equal Channel Angular Extrusion (ECAE) using a movable ram-die with different geometries of their deformation spaces (extrusion angles) have been developed and considered. On the basis of the performed simulations using CAD/CAM software, the data on the mean values of effective strain and their distribution are processed depending on the contact friction between the tool and the work-piece. The selected modes are compared and analyzed in terms of effective strain means and their dependence on contact friction. It has been found that the single-angled ECAE-MRD modes allow for a greater mean values of the effective strain compared to multi-angled ECAE patterns. It has been proven that the strain distribution non-unifo