• K VIJAY KUMAR
• N RAMANAIAH
• N. BHARGAVA RAMA MOHAN RAO
• NARENDRA KUMAR KOLLA

In the field of Metallurgy, a flux is either chemical cleaning, a flowing or a purifying agent. They can be used either for extractive or metal joining. The current study aims to investigate the metallurgical, mechanical, and weld morphology of "AH36" marine grade steel with an 8mm thickness by "A-TIG" butt weld joints using a multitude of fluxes, such as TiO2, Fe2O3, SiO2, ZnO, MoO3, and V2O5, as well as a duplex of TiO2 50% + Fe2O3 50%, SiO2 50% +ZnO 50%, and MoO3 50% + V2O5 50%. at the same process variables, with welding speed, held constant at 120mm/min and current 200Amp. In this study, have been carefully analyzed the depth (D), width (W), and depth/width (D/W) ratio of the weld bead, as well as the heat input behavior, were analyzed and as compared to traditional TIG (Tungsten Inert Gas) welding. In the due process it observed that the application of duplex flux produced a significant depth of penetration (more than base metal plate thickness) and less heat input. Further, we have investigated weld geometrical dimensions and uncovered the two primary reasons for improved weld bead dimensions were reverse Marangoni transformation and arc constriction. Furthermore, metallurgical characterization, mechanical properties of weldments generated by oxide fluxes were investigated using optical microscopy, SEM(EDS), Vickers micro-hardness, and tensile properties with MAKE-M/S Instron (Model no: 8801) in contrast to conventional TIG welding. The resulted microstructure, micro-hardness, and tensile profiles revealed that duplex fluxes coated welds had better mechanical properties than normal TIG.

A-TIG Welding, AH36 steel, F.Z, HAZ, PM, weld bead depth, weld bead width

"INFLUENCE OF OXIDE FLUXES AND DUPLEX FLUXES ON MICROSTRUCTURAL, MECHANICAL PROPERTIES, AND WELD MORPHOLOGY OF A-TIG AH-36 STEEL WELDMENTS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 9, page no.d348-d360, September-2021, Available :http://www.jetir.org/papers/JETIR2109337.pdf

"INFLUENCE OF OXIDE FLUXES AND DUPLEX FLUXES ON MICROSTRUCTURAL, MECHANICAL PROPERTIES, AND WELD MORPHOLOGY OF A-TIG AH-36 STEEL WELDMENTS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 9, page no. ppd348-d360, September-2021, Available at : http://www.jetir.org/papers/JETIR2109337.pdf