The effects of friction confficient and strain rae on the AI5052 sheets fabricated by CGP process

In order to produce nano-size-grained material, the severely plastic deformation (SPD) is known as a novel method in order to prepare high-strength alloys in industry. In this method, the size of the grains is fined by subjecting specimen to severe strains. The finer the grains become, the more the yield and ultimate strength would increase. The constrained groove pressing (CGP) process is one of the SPD methods which used to fabricate nano-size-grained metal sheets. In this study, the strength and hardness of the Al5052 sheets fabricated by CGP process are numerically and experimentally investigated. The process is then simulated in DEFORM 2D commercial software. The effects of the friction coefficient (between specimen and dies) and stain rate (velocity of the dies in vertical direction) on the mechanical properties of fabricated sheets are studied. The results reveal that the increase of the friction coefficient and strain rate, would lead to the increase of the strength behaviour of the specimens. The results are in a good agreement with those obtained by experimental and analytical investigation.

کلیدواژه ها:

Constrained Groove Pressing ، Aluminum 5052 ، Friction ، Mechanical Properties ، DEFORM 2D