On the effect of acute angles on deformation homogeneity in equal channel angular pressing

Finite element calculations for strain development and deformation homogeneities under equal channel angular pressing (ECAP) considering the channel angle, friction and the channel thickness show that general phenomena characteristic of ECAP still hold when the channel angle is acute (ϕ = 75°), in contrast to the conclusion of the recent paper on acute channel angles [A.V. Nagasekhar, Y. Tick-Hon, S. Li, H.P. Seow, Mater. Sci. Eng. A410–A411 (2005) 269–272] that formation of corner gap was not a factor for the acute channel angles.