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Introduction to Gas Metal Arc Welding Process

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Pulse Current Gas Metal Arc Welding

Part of the book series: Materials Forming, Machining and Tribology ((MFMT))

Abstract

The operational characteristics of gas metal arc welding (GMAW) process influencing the behavior of weld with respect to its geometry, microstructure and defects has been described. It is presented in reference to the behavior of metal transfer , thermal characteristics of the process and thermal description of the weld. Three primary mode of metal transfer from electrode tip commonly known as short circuit , globular and spray transfer as a function of current and voltage of the GMAW process have been explained. Thermal behavior of the entire system which is basically responsible to govern the weld characteristics has been described in terms of the cause considered as thermal characteristics of the process and its effect as thermal behaviour of the weld. The thermal characteristics of the process are analytically stated in terms of melting of filler wire and thermal nature of metal transfer. The thermal description of weld is analytically discussed with respect to the effects of heat flow, fluid flow and metal transfer. The weld characteristics considered in terms of its geometry, microstructure and defects are primarily discussed in terms of the behavior of deposition and flow of liquid metal followed by the mechanism of its solidification.

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  1. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India

    Prakriti Kumar Ghosh

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Ghosh, P.K. (2017). Introduction to Gas Metal Arc Welding Process. In: Pulse Current Gas Metal Arc Welding. Materials Forming, Machining and Tribology. Springer, Singapore. https://doi.org/10.1007/978-981-10-3557-9_1

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