Characterisation of force and torque with auxiliary heating during friction stir spot welding of AA2024-T3

• DOI: 10.1016/j.rinma.2024.100535
• Publication Date: 2024-02-01T21:19:06Z
• Authors: D. Tobin; S. O'Shaughnessy; D. Trimble
• Keywords: Spot welding; Friction torque; Friction Stir Welding

The peak forces generated in friction stir welding impose substantial constraints on the process window of technology, affecting factors such as machine scale, design, and range applicable materials. In this study, a combination tool force monitoring post-weld evaluations is employed to investigate impact auxiliary assistive heating various parameters including maximum torques effects preheating has microstructure mechanical behaviours during spot AA2024-T3 plates lap joint configuration. methodology involves workpieces different temperatures, were measured using dynamometer. Most notably, workpiece before plunge stage yields reduction forces. A decrease 69 % 76 vertical torque, respectively, was observed temperature increased from 20 °C 400 °C. Furthermore, addition exhibited no significant statistical effect shear tensile performance resulting welds. These reductions offer potential for extended life, decreased machinery expenses, broader material applicability, all while maintaining original integrity.