Experimental and numerical investigation of groove pressed UFG pure aluminum

Fabrication of ultrafine grained materials by imposing severe plastic deformation for improvement of mechanical and physical properties of metals have been focused of many researches over the past few years. In this process, sheet is subjected to repetitive shear deformation conditions by utilizing asymmetrically grooved and flat dies through alternate pressing. In this study, a 2mm thick commercial pure aluminum sheet was subjected to repetitive pressing up to four passes. Mechanical properties including, hardness and tensile were obtained. Results show that, although increasing the number of the passes causes higher strength magnitude, the strength’s slope decreases. After validation of finite element modeling, strain distribution and uniformity behavior of the grooved plate were investigated using plain strain and plain stress conditions. Results shows that strain in the surface and near the teeth of die are lower than other areas.

Keywords:

Severe plastic deformation , constrained groove pressing , Ultrafine-grained material , Aluminum