Experiences on toughness investigation of high-strength structural steel welds

ISMAR HAJRO

Faculty of Mechanical Engineering, Sarajevo, hajro@mef.unsa.ba

ZIJAH BURZIĆ

Military-Technical Institute, Belgrade, zijah_burzic@vektor.net

Abstract: Material's toughness become more significant material mechanical property, as well as design variable, with recent advances of fracture mechanics understanding. Also, toughness is particularly important parameter for novel structural materials such as high-strength steels. Furthermore, due to the fact that high-strength steels are mainly used in various welded structures, evaluation of welded joint mismatched properties, including toughness, become particularly important. Therefore, the following paper presents investigation results of impact and quasi-static toughness distribution and mismatch on high-strength steels welds. Welded joint’s characteristic heterogeneous zones are obtained by mean of real welding and welding simulation. Finally, relation terms between various mechanical properties, including toughness, for further simplified engineering prediction are provided.