Shear features during equal channel angular pressing of a lamellae eutectic alloy

Shear features of a lamellae eutectic alloy Al–33% Cu alloy during equal channel angular pressing (ECAP) at 400 °C via route Bc was investigated. The intense shear strain of ECAP is accommodated by various form of periodical shear banding: periodical bending, periodical shear banding, parallel shearing, and shear cutting in the eutectic lamellae. The shear banding was observed to occur in various styles of mild or sharp in deformation intensity, symmetric or asymmetric in morphology, and with orientation angle varying from ∼10 to ∼90° with respect to the lamellae orientation.