The purpose of this study was to investigate the effect of flux solvent on the depth-to-width ratio (DWR), microstructure, and the hardness of Incoloy 825 with activated tungsten inert gas (A-TIG) welding process. Effect of solvents on active flux of TIG welding for geometry characteristics were investigated by metallographic and defense tests. The arc constriction and Marangoni convection are considered as the two main factors for increasing the penetration of the A-TIG weld pool. Marangoni convection provided change to fluid flow in the anode area of welding it formed a thermionic electron condition because of the large positive ion collisions in the welding arc. This study investigated the effect of acetone/isopropanol as a TiO2 active flux solvents on A-TIG incoloy 825 autogenous welding. Metallography observations carried out give the best results on the addition solvents of 40% isopropanol can provide DWR 0.549 while 100% acetone solvent has DWR 0.321 and for 100% isopropanol solvent has a much smaller DWR which is 0.276. In addition to providing penetration rates, this isopropanol have an effect increasing of hardness especially in the fusion line at 40% isopropanol 198.79 HV and 100% isopropanol 202.52 HV.

Original languageEnglish
Article number042039
JournalIOP Conference Series: Materials Science and Engineering
Issue number4
Publication statusPublished - 1 Jul 2019
Event9th Annual Basic Science International Conference 2019, BaSIC 2019 - Malang, Indonesia
Duration: 20 Mar 201921 Mar 2019


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