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Plasma gas metal arc welding (GMAW) is a process that can be defined as a combination of plasma arc welding (PAW) and GMAW within a single torch, where a filler wire is fed through the plasma nozzle orifice. Although originally referred to as plasma-MIG welding, the preferred term is plasma-GMAW. This article provides a detailed discussion on the operating procedures, advantages, disadvantages, and applications of GMAW and describes the equipment used in the plasma-GMAW.

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Ian D. Harris, Plasma Gas Metal Arc Welding, Welding Fundamentals and Processes, Vol 6A, ASM Handbook, Edited By T. Lienert, T. Siewert, S. Babu, V. Acoff, ASM International, 2011, p 318–320,

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