Final answer:
The welding method being described is TIG welding, which uses a non-consumable tungsten electrode and a mixture of argon and helium as a shielding gas, ideal for welding non-ferrous metals like aluminum, magnesium, and titanium.
Step-by-step explanation:
The welding method being described is Tungsten Inert Gas (TIG) welding, also known as Gas Tungsten Arc Welding (GTAW). This welding process uses a non-consumable tungsten electrode to produce the weld, and a filler material, often in the form of a wire, is used when needed. During the welding process, an inert shielding gas mixture, typically consisting of argon and helium, is used to protect the welding area from atmospheric gases such as oxygen and nitrogen that could cause oxidation and other defects in the weld.
TIG welding is renowned for its ability to produce high-quality, precise welds, particularly on thin materials. It is frequently used for welding non-ferrous metals like aluminum, magnesium, and titanium, which are known for their reactivity and propensity to oxidize quickly when heated. It is suitable for applications that require strong, high-quality welds, including aerospace, automotive, and many other industries.