Effect of Annealing Process on Recrystallization Microstructure and Properties of 1235D Aluminum Alloy Sheet

Abstract

The annealing process during cold rolling significantly affects the mechanical properties of cold-rolled 1235D aluminum alloy sheets and their foil products. The effect of the annealing process on the recrystallized structure and properties of 1235D aluminum alloy cold-rolled sheets was studied. The results show that their tensile strength decreased with the increasing annealing time, from 96 to 89 MPa at 500 °C for 5 to 240 min, the elongation remained unchanged, though. The tensile strength decreased from 93 to 90 MPa with the increasing annealing temperature from 440℃ to 560℃, while the elongation also decreased, from 37.4 to 36.8%. The heating and cooling methods of the annealing process have little effect on the tensile strength of cold-rolled sheets after being annealed. In contrast, slow heating and slow cooling are both beneficial for improving their elongation but correspondingly reduced their tensile strength.KeywordsAluminum alloyAnnealingRecrystallizationTensile strengthElongation