Effect of filler on mechanical properties of tungsten inert gas welded joint of dissimilar aluminum alloys

This study presents an appropriate welding filler to join dissimilar aluminum alloys AA۶۰۶۱ and AA۵۰۸۳ using the tungsten inert gas (TIG) process. The TIG welding of AA۶۰۶۱ and AA۵۰۸۳ was butt joined with three different fillers: ER۵۳۵۶, ER۴۰۴۳ and ER۵۱۸۳. The experiments were conducted in order to investigate the mechanical properties. The effects of the different fillers used on the weld joints were analyzed by their visual appearance, hardness and strength. It was found that welding by using filler ER۵۳۵۶ produced the highest ultimate tensile strength of ۱۷۵ MPa compared to the weld joints using fillers ER۴۰۴۳ and ER۵۱۸۳ with values of ۱۶۷ MPa and ۱۶۶ MPa, respectively. It can be concluded that TIG welding using the ER۵۳۵۶ filler yields better joint compared to ER۴۰۴۳ and ER۵۱۸۳.