Experimental Study of Hardness by Friction Stir Welding of 6061-T6 Aluminium Pieces. International Journal of Current Engineering and Technology, [S. l.], v. 3, n. 3, p. 792–794, 2013. Disponível em: https://ijcet.evegenis.org/index.php/ijcet/article/view/361. Acesso em: 4 apr. 2026.