Nanostructured AA6063 alloy using equal channel angular pressing

By means of severe plastic deformation, acquiring nanoscale within size range of less than 500 nm has hardly been reported in the literature. In this paper, a novel approach is proposed to acquire nanostructured AA6063 alloy within a size range of less than 100 nm using equal channel angular pressing (ECAP). This includes application of a specially designed pre-deformation thermomechanical processing after initial solution treatment. The pre-deformation treatment starts with two passes deformation in ECAP followed by annealing at 500 ᵒC for 10 sec and quenching in water. An equiaxed nanostructured AA6063 alloy within the size range of less than 100 nm is obtained after 6 passes ECAP while more than 69 % of boundaries are high angle ones.

Keywords:

Nanostructure , Aluminium , Equal channel angular pressing