Study on the Performance of FSW Joint Welded of Aluminum Alloy by S-Type Track

The article adopts S-Type track friction stir joining to butt joining of 10 mm thick 6061-T6 aluminum alloy, and conducts impact toughness test and 24h salt spray corrosion on the joint area. On the premise of ensuring the tensile strength, by changing the swing radius of different S-shaped trajectories, and comparing with the conventional linear joining trajectory, it is obtained that at a speed of 500r/min, a joining equivalent speed of 130 mm/min, and a swing radius of 0.5 mm Under the parameters, the maximum impact toughness is 80.74 J/mm2, and the corrosion resistance is better than the base material and the straight joining track. The S-shaped trajectory of friction stir joining area with a swing radius of 0.5 mm forms a “thousand-layer cake” structure with high bonding strength, which can effectively improve the impact resistance and corrosion resistance of the joining area.