Investigation of mechanical properties of friction stir welding aluminium alloy AA7475-T651 and AA2219-O

Abstract

In this study, two dissimilar aluminium alloys are joined together through friction stir welding, and their microstructure and mechanical properties like hardness and fracture analysis. In this paper, Al alloy AA7475-T651 and AA2219-O is chosen for Friction stir Welding due to the different hardness level. The welding process is executed with the optimized input parameters and the welding joints quality was inspected. Hardness properties were tested in Thermomechanically affected zone, heat-affected zone, and Welding Zone. The fracture analysis method is used to identify the defects in the welding zone. Finally, the quality of the welding is justified by the hardness and fracture analysis, based on the results the welding process can be applied for different harness Al alloys.