Published 07/15/2025 at 1135 × 379 in A Review of Bobbin Tool Friction Stir Welding (FSW) Process Fig. 3: (1) Instrumentation chart (2) Hardness survey mid-thickness in 25mm thick 6082-T6 aluminium weld Fig. 3: (1) Instrumentation chart (2) Hardness survey mid-thickness in 25mm thick 6082-T6 aluminium weld