摘要：A study is presented on the behaviour of an AA6082 aluminium alloy during ECAP. The pressing curves were analysed in terms of billet flow path along the cornered die. Analyses on samples taken from interrupted tests showed that a complex strain path system was active. Evidence of curvature of the original grain structure suggested that bending around the corner of channel intersection occurred and superimposed to shear deformation. From comparisons between experimental pressing loads and numerical estimates based on simplified conditions, it was suggested that that frictional effects are of large importance and it was confirmed that other strain components differing from pure shear markedly affect the billet flow in the ECAP die.
