Structural characteristics of friction stir circumferential spot welding of 3003 aluminum alloy
To address the issues of cracks, porosity, and joint softening that are prone to occur during the welding of thin aluminum alloy sheets, this paper proposes a novel friction stir circumferential spot welding (FSCSW) process and designs a ring-shaped tool with a specific tip morphology. Using 2024 aluminum alloy sheets...