Abstract:
A rare aggregation of properties makes aluminium and its alloys one of the most
versatile engineering and construction materials available today. Aluminium is light in
weight, yet some of its alloy has strengths exceeding the mild steel which retains
strong at low temperatures, excellent corrosion resistance, high reflectivity, good
electrical and heat conductor, non-magnetic, non-toxic and other properties. This
research investigated different fillers on microstructure and tensile properties of
welded AA5083 aluminium alloy joints. Aluminium 5083 can be successfully welded
with filler alloys 5183 and 5356 which any of these three filler alloys may be suitable
for welding this base alloy. The reason to choose one of these filler alloys over the
others is determined on the application and service requirements of the component
being welded. Gas Metal Arc Welding (GMA W) or Metal Inert Gas (MIG) has been
chosen to weld aluminum alloy 5083. The mechanical properties of the weld were
investigated using the tensile testing machine and hardness. Besides, the
microstructure of the welds, including the nugget zone and heat affected were
observed using optical microscopy. The corrosion resistances of welded AA5083
aluminium alloy joints were investigated in a highly corrosive environment made in
the salt spray chamber. The results of these tests are presented in this paper. This
study revealed that, the tensile strength of 5083 alloy welded with filler 5356 was
nearly similar to the base metal but the ductility was considerably lower while filler
5183 displayed excellent ductility, good tensile strength but low in yield strength.
