Introduction Gas metal arc welding GMAW is a welding process that has been commercially available for around 60 years. The basic operation of the GMAW process occurs when an electrical arc is established and maintained between a base material and a continuously feed wire electrode. The molten weld pool is shielding from the atmospheric conditions by an envelope of shielding gas that is flowed continuously around both the wire filler metal feeding in the weld pool and the weld pool itself. The heat of the electrical arc serves to locally melt the base metal as well as melt the wire filler metal that is being fed into the weld. There are two entities at play in the GMAW process:.
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Gas metal arc welding GMAW is a semiautomatic welding process that uses a wire electrode fed through a welding gun. This continuous wire feeding during welding frees up the welder and allows him or her to focus fully on the gun position so that the proper arc length is maintained. The benefits of the process include its high deposition rate, efficient use of filler metal, elimination of slag and flux removal, and reduction of smoke and fumes. Also, the shielding gas required in GMAW may make outdoor applications more challenging.
This research gives the detail influence of welding process parameters such as welding current, welding voltage, wire speed on the penetration in EN S Grade mild steel material. The experimentation of this research has been carried out by using three factors, three level Taguchi DOE method. Length of Penetration in addition to the depth of penetration is major concern in fillet welded joints, as the penetration decides the strength of the welded joint. Research Paper. Journal of Welding and Joining ; 35 1 :
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