Dependence of microstructure evolution on rolling conditions in AA1050 aluminum alloy

Abstract

Cold rolling has often been employed to tailor the microstructure and to achieve desired mechanical properties. In this study, the formation of sub-grain and grain orientation evolution in cold rolling processed AA1050 aluminum was investigated by electron backscatter diffraction (EBSD) characterisation. The experimental results demonstrated that increasing rolling reduction facilitates the transformation from sub-boundaries to high angle boundaries within grains by accumulating misorientation, and asymmetric rolling could impose a higher equivalent plastic strain, accelerating the grain refinement. The formation of small and equiaxed grains demonstrates that asymmetric rolling with high reduction promotes the recrystallization in (112) grains and contributes to the formation of (110) fibre in aluminum.