In earlier days, welding only involves joining two metals of same kind and dissimilar metals were usually joined by fasteners. Friction Stud welding is a true engineering marvel of making welds between dissimilar metals without any melting or fillers involved. The friction stud welding doesn’t involve heat generation from electricity and it is purely based on friction. Besides these facts the friction stud welding has numerous advantage and applications. This paper focuses on the process of stud welding, application and its limitations.
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
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