Effect of post-weld heat treatment on the mechanical behavior and dislocation density of friction stir welded Al6061

Al6061 is a heat-treatable aluminum alloy and an extremely versatile material used in settings where medium to high strength is required. To produce good joints using this alloy, a particular solid-state welding process called friction stir welding (FSW) is preferable instead of the conventional welding methods. In this study, the effects of T6 post-weld heat treatment (PWHT) on the mechanical properties, dislocation density, and microstructure...