Severe plastic deformation of copper and Al–Cu alloy using multiple channel-die compression

Severe plastic deformation studies of copper and Al–Cu alloy by multiple channel-die compression tests were investigated. The materials were tested under plane strain condition by maintaining a constant strain rate of 0.001/s. Extensive grain refinement was observed resulting in nano-sized grains after severe plastic deformation with concomitant increase in flow stress and hardness. The microstructural investigation of the severely deformed materials was investigated using optical microscope and scanning electron microscope. Shear band formation was identified as the failure mechanism in the two phase Al–Cu alloy. The results indicate difficulty in obtaining severe plastic deformation for alloys having two phase micro-structure.