Comparative study of MIG welding and TIG welding techniques – A Literature Review

In the present paper, we have tried to review the literature available on comparison of different welding processes and optimization methods. Comparison between different fusion welding techniques, mainly Tungsten Inert Gas (TIG) and Metal Inert Gas (MIG) is done. The welding process can be compared in terms of microstructure, macrostructure, residual stress, mechanical properties, hardness, elongation, corrosion resistance, filler material etc. Conventional fusion welding techniques also have various problems associated with them like slow cooling rate, arc destabilization, high heat inputs etc. Further advancements in welding research has made concept of hybrid welding a possibility which is gaining popularity. The aim of the paper is to review the study done between different fusion welding techniques and compare them to provide basis for further research.