Effect of the heat treatment on the hot deformation behaviour of AA6082 alloy

Effect of heat treatment on hot deformation behavior and microstructure evolution of 7085 aluminum alloy

“…These explanations were also in correspondence with higher hot deformation activation energy of the alloy after solution treatment than that of the alloy after homogenization treatment. These phenomenons have been observed in 6082 Al alloy [9], 6201 Al alloy [10] and 2024 Al alloy [11]. From the above experiments and explanations, it is obvious that the flow stress of the alloy after solution treatment is significantly higher than that of the alloy after homogenization treatment under the similar compression condition, especially at low deformation temperature.…”

“…Totik and Gavgali [8] found that the differences of peak flow stress and fracture strain between ingot surface and center were gradually decreased with an increase homogenization temperature. Zhang and Baker [9] reported that 6082 Al alloy treated by the T4 temper showed distinct softening at the low strain rate while there was no significantly softening under annealing treatment. McQueen et al [10] revealed that dynamic precipitation increased the initial flow stress of Al-Mg-Si alloy and resulted in shear banding and fine polygonized substructure.…”

Influence of cooling rate after homogenization on the flow behavior of aluminum alloy 7050 under hot compression

“…Therefore, a number of studies have been done on the hot workability of these alloys [1][2][3][4][5][6]. A general finding is that the flow stresses of these alloys increase with deformation temperature decreasing or strain rate increasing.…”

“…For the alloy with stable microstructure (e.g. overaged), the flow curves often exhibit a sharp peak and then a steady state, which is controlled by dynamic recovery [1][2][3]. But for the alloy with unstable microstructure (e.g.…”

“…But for the alloy with unstable microstructure (e.g. solution-treated), higher flow stress may be obtained due to dynamic precipitation and the flow curves often exhibit significant softening due to subsequent particle coarsening [1][2][3]. This often takes place under the condition of low-strain-rate deformation, because there is enough time for occurrence of dynamic precipitation [1][2][3][4].…”