Structure and Properties of Al Mg alloy Processed by Equal Channel Angular pressing at different channel angles-90°, 120°

The changes in microstructure and mechanical properties of Equal Channel Angular Pressing (ECAP) processed Aluminium Magnesium alloy at different channel angles (90 degrees, 120 degrees) were discussed in this paper. Ultrafine grain of A5083 was produced by severe plastic deformation method using ECAP. Al 5083 has good formability due to excellent ductility. It has proven itself as a lightweight, durable and affordable material that allows going faster speeds. The microstructure, fracture behaviour was investigated by means of optical microscope and Scanning Electron Microscope. Mechanical properties of the specimens were evaluated under both channel angles. Tensile Strength, Misorientation angle and hardness were compared. Results reveal that 120 degrees processed samples posses lower strength than 90 degrees channel angle. ECAP was performed at Route A with the radius of curvature of 20 degrees up to four passes. In both the cases the strength increases after ECAP passes but higher the value was obtained in 90 degrees Channel angle. (c) 2018 Elsevier Ltd. All rights reserved.