%0 conference lecture %@ %A Szabo, R.,da Cunha, P.H.,Bergmann, L.,dos Santos, J.F. %D 2014 %J 7th European Conference on Steel and Composite Structures, Eurosteel 2014 %N %P %T Preliminary Study of Friction Stir Welding Applied on Structural Steels S235 And S355 %U %X