Wakchaure KN, Thakur AG. Mathematical and experimental examination of the effect of the stepped pin tool profile on the characterization of AA 6061-T6 underwater friction stir welding. Metall Mater Eng [Internet]. 2022 Dec. 31 [cited 2026 Apr. 28];28(4):593-624. Available from: https://www.metall-mater-eng.com/index.php/home/article/view/869