Investigations of microstructural and mechanical properties evolution of AA1050 alloy sheets deformed by cold-rolling process and heat treatment annealing

The aim of this contribution is to study the performance of the homogenized aa1050 alloy,as well as after the different metallurgical conditions such as,cold-rolling and cold-rolling annealed. for this reason,microstructures,microhardness and tensile tests were studied. from the most important results,the optical micrographs show that with increasing cold-rolling reduction rate,the equiaxed grains are elongated along the rolling direction obviously. the accumulation of rolling reduction increases the work hardening effect,which is a good agreement with the improvement of strength and low plasticity. we can giving some values; when cold-rolling reduction is about 66 %,the ultimate tensile strength reaches 140 mpa,the microhardness is 53 hv0.3 but elongation is only 1.75 %. after cold-rolling and the annealing treatment,the sem micrographs and the drx patterns show more secondary phase precipitates and more intermetallic formed. with an increase of annealing temperature,the amount of precipitates increases and work hardening decrease,continuously. the elongation is improved to 36 % but the tensile strength is decreased to 86 mpa after the annealing at 350 ° c for 1 hour. © 2017,university of mohammed premier oujda morocco.