Comparison of Microstructure and Mechanical Properties of friction Stir welding of Al 6082 aluminum alloy with different Tool Profiles

This study aimed at the analysis of the metallurgical and Mechanical properties FSW joints welded with different tool profiles. In this project, Experiments are performed for friction stir welding of Al 6082 aluminum alloy with different tool profiles. The welding was performed on a vertical milling machine. The welds are produced by varying the tool profiles; the rotational speed was maintained at 1400 rpm and the welding speed was kept constant 90 mm/min. The Microstructure analysis resulted in distinct lamellar bands and various degrees of intermixing that were correlated with different tool profiles. Tensile tests were conducted as per ASTM standards and, an increase in the tensile strength is observed with the increase in the number of the edges of the tool. Scanning Electron Microscope is used to inspect the fracture surfaces which suggested low mechanical strength and failure through the stir zone is due to inadequate material intermixing (C) 2016 Elsevier Ltd. All rights reserved.