Behavior of β phase (Al3Mg2) in AA 5083 during friction stir welding

► AA 5083 was friction stir welded after heat treatment. ► Al3Mg2 (β phase) was precipitated along the grain boundary in AA 5083 after heat treatment. ► Al3Mg2 (β phase) was dissolved in the matrix after friction stir welding. ► More weigh loss was occurred at heat treatment sample due to precipitating of Al3Mg2 (β phase). ► SZs has almost same weigh loss due to dissolving of Al3Mg2 (β phase) during friction stir welding.