Porosity reduction in aluminium welding using TIG-MIG hybrid welding

Welding is a manufacturing process in which two or more components are joined with heat, pressure, or a combination of the two, resulting in a joint after the components cool. The effect of the welding process on porosity formation in Aluminium 5083 was studied by comparing both conventional MIG and TIG-MIG hybrid welding process. This study focuses on applying the TIG-MIG hybrid welding compared with conventional MIG welding process in reducing the porosity formation of welded bead Aluminium 5083. In order to achieve a better result, 70A, 80A, 90A, and 100A current settings were compared for both welding processes. Weld profile and porosity formation was evaluated using an Optical Microscope. From the findings, lower current and welding speed were discovered to increase porosity in welded bead Aluminium 5083. During the MIG welding process, bubbles tend to travel upwards, and some pores are prevented from escaping adequately, specifically in the upper region where pores clustered. Thus, the TIG MIG hybrid welding procedure might delay the solidification time during welding, resulting in the lowest amount of Aluminium 5083 porosity formation. Overall, the purpose of this study was achieved, as the TIG MIG hybrid welding process was shown to reduce the formation of porosity in welded Aluminium 5083 beads.