Abstract
Recently, simple shear extrusion is introduced to fabricate ultrafine-grained materials. It was designed for billets with square cross-sections and was investigated well previously. This study aims to introduce an alternative design of simple shear extrusion process with a circular cross-section, which is named circular simple shear extrusion. The deformation behavior during the new process is investigated by finite element analysis using ABAQUS/Explicit software package. The load of the process and the strain distribution on the processed-sample are studied by a set of simulations. The results show that, in comparison to conventional simple shear extrusion, the circular simple shear extrusion process needs lower extrusion pressures. Also, the accumulated strains are closer to theoretical ones. The amount of friction force in the process with circular cross-section is lower in comparison with the square one which leads to both, the longer service life of the circular simple shear extrusion dies and the lower cost of production. Hence, this new geometry has a strong potential in terms of industrial applications.
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