Tungsten Inert Gas (TIG) welding is widely used for weld the thin metal. Alloying metal is also welded by this process. Appearance and quality TIG weld is very superior as compare to other welding process. Melting the work piece and filler rod result in formation of smoke and gases. Helium and Argon are non reactive gases by this property it is used as a shielding gas. Most commonly mixture of Argon and Helium are favored to use for enhanced welding quality because they do not react with each other .Argon and Helium gases protect the welding area from outer environment and helps to maintain a stable arc due to low ionization potential. Aluminum is light in weight and for excellent performance it is used in aerospace industry, aviation, marine industry, automobile, defence and others. TIG welding parameters such as welding current, gas flow rate and welding voltage are taken into account which influences the tensile strength, Hardness and Toughness of aluminum weld joint. Welding parameters are controlled with electronic control units. AC power supply is prefer to used for aluminium as compare to DC power supply because of its low melting point aluminium melt at low temperature
Aluminum Alloy Aa 6351-T6, Mechanical Properties, Tig Welding
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