Gas Tungsten Arc Welding (GTAW)-TIG welding operations

Gas-tungsten arc welding (GTAW) uses a permanent,  non-consumable tungsten electrode to create an arc to a workpiece. This electrode is shielded by an inert gas, such as argon or helium (or a mixture of the  two), to prevent electrode degradation; hence the older, common names tungsten-inert  gas (TIG) and heli-arc welding. As shown in Figure below, current from the power supply is passed to the

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