influence of heat treatment on the aa6061 and aa6063 aluminum alloys behavior at elevated deformation temperature

The hot deformation behavior of the heat-treated aa6061 and aa 6063 aluminum alloys by t6-1, t6-2artificial aging treatment, and o annealing treatment were studied by compression testing over a temperature rangeof 350–550°c and strain rates of 0.005-0.1 s^-1. it was observed that the flow stresses of the studied aluminum alloystreated by the t6-1 and t6-2 heat treatments were significantly higher than those of the o annealing treatment.moreover, the stress-strain curves of the heat-treated alloys by the t6-1, t6-2, and o heat treatments demonstratedsignificant softening during deformation at the lowest strain rate under any of the deformation conditions. forseveral strains, the activation energy of hot deformation was specified and obtained to vary significantly with strainfor the heat-treated alloys by the t6-1 and t6-2 treatments. the stress-strain data calculated from a linear equation,with strain-dependent parameters, shows a great fit with the experimental data for the heat-treated aluminum alloys.