Effect of activating flux on aluminum ۶۰۶۱ and its mechanical properties by gas tungsten arc welding process

The current research was carried out with the aim of increasing the penetration depth and improving the mechanical properties of weld region by addition of the active fluxes of titanium oxide (Tio۲) and silicon oxide (Sio۲). Tungsten inert gas (TIG) welding is applied on Aluminum ۶۰۶۱ alloy and active fluxes including SiO۲ and TiO۲ with ۲.۵, ۷.۵, and ۱۰ wt% are added. Up to now, TIG welding on aluminum ۶۰۶۱ with SiO۲ and TiO۲ fluxes has not been carried out. Mechanical properties were determined using tensile and Vickers micro-hardness experiments. The results show that the highest tensile strength corresponds to the base metal and in welded specimens is related to ۱۰% TiO۲ active flux. The ratio of tensile strength using titanium active flux and without flux mode is ۹۰%. The use of both active titanium oxide and silicon oxide flux make the welded specimen granular and increases its strength. The effect of addition of titanium oxide is more noticeable than that of the silicon oxide flux since titanium oxide plays a key role on the granularity than the silicon oxide.

Keywords:

Tungsten Inert Gas , ۶۰۶۱ aluminum alloy , Mechanical properties , Active flux , Titanium and silicon oxide