A Modification on ECAP Process by Incorporating Elliptical spiral channel

The fine-grained metals and alloys produced in various ways have good mechanical properties such as high strength, high toughness and proper formability and have certain applications. In recent years, studies of different methods of producing and improving the mechanical properties of specimens have been the subject of much research. Recently, the processing of this type of material using severe plastic deformation has received considerable attention from researchers. In this study, in order to modify the conventional ECAP method, The copper specimen was subjected to severe plastic deformation by means of a new die named combined die. In order to compare the mechanical properties of the produced specimens with this method and ECAP, the experimental tests were performed. By investigation the hardness values at different points from the cross-section of the specimens as well as the determination of strength and grain size in the created microstructures, it was found that after performing the present method, a finer grain structure with a higher degree of hardness, yield strength and Ultimate tensile Strength could be obtained compared to the ECAP method