Effect of cold rolling deformation before intermediate annealing on microstructure and properties of 6A16 aluminum alloy

Abstract

Effect of different cold rolling deformations before intermediate annealing on the microstructure and forming properties of 6A16 aluminum alloy sheet during subsequent processing was investigated by means of EBSD and mechanical properties tests.The results show that with the increase of cold deformation before intermediate annealing, the size of the grains after annealing decreases, the proportion of complete recrystallization increases,and the sheet possesses a typical deformed structure after cold rolling, and the grain size increases gradually.After T4P treatment,with the increase of the cold deformation before the intermediate annealing,the grain size of the cold-rolled sheet increases, the work hardening exponent n10%-20% value does not change and the plastic strain ratio r10% value increases.It shows that, the forming ability of the sheet is the best when the cold rolling deformation before annealing is 66.67%.

Keywords

• intermediate annealing
• aluminum alloy
• microstructure
• forming property