A review on TIG welding technology variants and its effect on weld geometry

Abstract This paper focuses on the major developments in the tungsten inert gas (TIG) welding technology for improving weld penetration depth during the welding process. TIG welding is an established arc welding process and it is extensively used for welding thin sections of almost all ferrous and non-ferrous material. However, the growing interest of industries in utilizing the process for welding mid-thick sections components led to numerous innovation in the TIG welding process. In this article, major variants of the TIG welding process i.e. pulse TIG, activated TIG, keyhole TIG, multi-electrode TIG welding process and its associated mechanism is described to understand the concept of improvement in weld penetration depth during the welding process. Furthermore, a systematic discussion on weld bead geometry obtained by different TIG welding process, starting from the mid of 2000 s to till date is presented. The major motive of this review paper is to explore the potential of the TIG welding process and provide a state-of-the-art to the industries as well as the academic world.