Numerical Simulation of Large-Sized Pure Aluminum Rod under Multi-Pass ECAP

Abstract

In order to obtain the bulk ultra-fine grain materials with excellent performance under the conditions of severe plastic deformation, the law curves of squeeze pressure, stress and strain of the extrusion process on large-sized pure aluminum rods had been gotten by the finite element simulation of 6-pass ECAP. With the increasing of extrusion passes, the maximum extrusion load increases significantly and the distribution uniformity on the values of equivalent stress and strain improves. So the multi-pass equal channel angular pressing can achieve good effect of grain refinement and improves the distribution uniformity of grain-size.