Pulsed DC Robotic MIG Welding of Non Heat Treatable Aluminum Alloys

Abstract

In this study, 5754 aluminum alloy sheets were joined at different welding speeds through the pulsed DC Robotic MIG welding method. The study includes microstructural and mechanical properties of welded joints. Tensile and three point bending tests were implemented in order to determine the mechanical properties of welded joints. The characteristics of the macrostructure and microstructure were examined via a stereo-microscope, an optical microscope. The hardness of the welded samples were measured on the cross section. As a result of the study conducted here, it was determined that mechanical properties are improved as welding speed increases. The porosities observed in the macrostructure did not have a significant reducing effect on mechanical strength.