FRACTURE CHARACTERISTICS DURING TENSILE TESTING DISSIMILAR BUTT-JOINT BETWEEN SS400 STEEL TO A5052 ALLOYS BY GMAW PROCESS

Abstract

Gas metal arc welding (GMAW) was used to joint dissimilar between SS400
steel and A5052 alloy withER-4043 welding wire. The specimen’s tensile strength
was tested by a universaltesting machine, the characteristics of fracture after tensile
strength testingwere investigated by Scanning Electron Microscopy (SEM). The
tensile strengthtest shows that the fracture in the welding seam when the tensile
strengthreaches the maximum value at 225.9MPa. The results of the test show that
not only Al and Fe crystal but alsothe Al3Fe và Al5Fe2 appeared.