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Manufacturing Process Selection Handbook by J. D. Booker, K. G. Swift

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Chapter 11

Joining Processes

11.1 Tungsten Inert-gas Welding (TIG)

Process Description

An electric arc is automatically generated between the workpiece and a non-consumable tungsten electrode at the joint line. The parent metal is melted and the weld created with or without the addition of a filler rod. Temperatures at the arc can reach 12,000°C. The weld area is shielded with a stable stream of inert gas, usually argon, to prevent oxidation and contamination (Figure 11.1).

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Figure 11.1 Tungsten Inert-gas Welding.

Materials

Most non-ferrous metals (except zinc), commonly aluminium; nickel; magnesium and titanium alloys; copper and stainless steel. ...

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