A novel technique to form gradient microstructure in AA5052 alloy

In this study, the recovery of strain hardening rate (RSHR) observed for the first time in the AA5052 alloy after the third, fourth, and fifth passes resulting in a good combination of strength and ductility. The fracture surfaces indicated that as the distance from the surface increased, the dimple depth in the fracture surface gradually increased. On the other hand, with increasing the number of passes, the size of dimples decreased owing to the formation of more recrystallized fine grains at the higher number of passes.
Source: Materials Science and Engineering: A - Category: Materials Science Source Type: research