Experimental Investigation of Activated-TIG Process for Monel 400 Alloy
Authors :- Bhati, Y., Katakpara, J., Badheka, V., Khanna, N.
Publication :- Advances in Manufacturing Engineering: Select Proceedings of ICFAMMT 2024, Springer
The primary obstacle in TIG welding is the limited penetration of weld, which hampers productivity. However, researchers have devised a solution called activated flux tungsten inert gas (A-TIG) welding, which is currently undergoing extensive investigation. This technique involves applying a layer of flux onto the surface workpiece before initiating the welding process, allowing for the effective utilization of the unmatched advantages offered by TIG welding. This study aims to examine how the activation of fluxes and adjustments in welding parameters impact the weld penetration and depth-to-width ratio (DWR) of weld beads in Monel 400 welds during the tungsten inert gas (TIG) welding process. Specifically, the investigation focuses on the use of activating flux in the TIG welding process (referred to as A-TIG welding). For the initial experiment, different single-component fluxes were employed, including NiO, MoO4, and TiO2. The effects of these fluxes on depth penetration and DWR of the weld beads were analyzed. During microstructural analysis, one examines the Heat-Affected Zone (HAZ), various types of grains, and microhardness of the workpieces.