Abstract
Equal-channel angular pressing (ECAP) is one of the methods of severe plastic deformation for producing ultra fine-grained (UFG) material. The aim of this work is to study the impact of the backward extrusion on the bulk ultra fine-grained structure of commercial Al-Mg-Si alloy (6082), which is produced by equal-channel angular pressing (ECAP), using route C technique up to eight passes with a high length to diameter ratio between 15 and 16. The products are investigated after one, four and eight passes. Backward extrusion tests are performed in all the three ECAP conditions and raw materials to collect information about this real technology. The induced anisotropy is monitored on the backward extruded pieces, particularly after one pass. This phenomenon also shows a limitation in the formability, especially after eight passes.