Published 07/03/2025 at 530 × 783 in A COMPARATIVE ANALYSIS AMONG THE WELDED Al-6061 PLATES JOINED BY FSW, MIG AND TIG WELDING METHODS Fig. 3 Rockwell hardness testing: (a) Image during indentation at a gap of 2 mm; (b) The tested specimens Fig. 3 Rockwell hardness testing: (a) Image during indentation at a gap of 2 mm; (b) The tested specimens