Abstract
Static shoulder friction stir welding (SSFSW) offers a promising solution for joining Al6061 and Ti6Al4V by addressing material mixing and intermetallic formation encountered in conventional friction stir welding (CFSW). SSFSW effectively suppresses material mixing and Al-Ti interdiffusion, leading to an Al5Ti2 – Al3Ti sequence through an exothermic reaction. Comparative analysis with underwater friction stir welding (UWFSW) highlights SSFSW's effectiveness, showing a significant reduction in intermetallic layer thickness compared to UWFSW. The intermetallic layer thickness of SSFSW is measured at 2.169 µm, while UWFSW exhibits a thickness of 3.731 µm, and CFSW shows the highest at 5.485 µm. The inverse pole figure confirms reduced material flow and intermetallic formation in SSFSW compared to UWFSW and CFSW.
Published Version
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