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Extrusion is an important Metal forming operation. It is a manufacturing process used to create long objects of a fixed cross sectional profile. The extrusion process is based on the plastic deformation of a material due to compressive and shears forces only. No tensile forces are applied to the extruded metal. The latter allows the material to withstand high deformation without tearing out the material. Basically, this procedure is based on the reducing and shaping the cross section of piece of metal squeezing the material through an orifice or a die. Typically the blocks of metal used for this procedure are long straight parts with circular cross sections.

Retraction of: Effects of the Extrusion Process Parameter by Prashant Baredar, Jitendra Kumar, Anil Kumar, Shankar Kumar and Ajeet Kumar Giri as it was republished due to oversite.