A systematic overview on activated-Tungsten inert gas welding

Abstract

An advanced type of Tungsten Inert Gas (TIG) welding called Activated Tungsten Inert Gas welding (or A-TIG welding) was developed to subdue the several limitations in TIG welding. The experimental set up for A-TIG welding is the same as that of TIG welding except that an activating flux powder in a paste form is coated on the weld line preceding TIG welding. The penetration in A-TIG technique is reported to be twice or thrice that of the TIG welding process. Therefore, research is continuously progressing over the years, validating the possibility of applying A-TIG welding to various types of materials using different fluxes. Owing to this, in this paper, a detailed review is made covering multiple aspects of the A-TIG welding process starting from its evolution to the latest advancements achieved. This review categorizes different types of studies performed in A-TIG welding so as to get an explicit outlook of the implementation of A-TIG welding in different aspects. The shortcomings of various researches conducted are suggested, and the future scope of investigations on A-TIG welding is also raised in detail.

Keywords:

• A-TIG
• flux
• penetration depth
• arc constriction
• Marangoni convection

Disclosure statement

No potential conflict of interest was reported by the author(s).