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Abstract

The gas tungsten arc welding (GTAW) process derives the heat for welding from an electric arc established between a tungsten electrode and the part to be welded. This article provides a discussion on the basic operation principles, advantages, disadvantages, limitations, and applications of the process. It describes the equipment used for GTAW, namely, power supplies, torch construction and electrodes, shielding gases, and filler metals as well as the GTAW welding procedures. The article concludes with a review of the safety precautions to avoid possible hazards during the GTAW process: electrical shock, fumes and gases, arc radiation, and fire and explosion.

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Lee E. Allgood, Gas Tungsten Arc Welding, Welding Fundamentals and Processes, Vol 6A, ASM Handbook, Edited By T. Lienert, T. Siewert, S. Babu, V. Acoff, ASM International, 2011, p 344–354, https://doi.org/10.31399/asm.hb.v06a.a0005590

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