The effect of hydrogen on the fracture toughness of friction-stir welded API 5L X70 pipeline steels - Giarola, Joseane Moreira; Avila, Julian Arnaldo; Cintho, Osvaldo Mitsuyuki; Pinto, Haroldo Cavalcanti; Oliveira, Marcelo Falcão de; Bose Filho, Waldek Wladimir (Fatigue & Fracture of Engineering Materials and Structures, 2022)