Comparative Microstructural, Mechanical and Corrosion Study between Dissimilar ATIG and Conventional TIG Weldments of 316L Stainless Steel and Mild Steel

Stainless steels and mild are widespread materials in several industries. The dissimilar welding of is a technique used to meet the needs various Mild steel 316L austenitic stainless have different chemical compositions thermal mechanical properties. Therefore, it would be interesting develop flux paste that ensure reliability sustainability welded structures made materials. In this work, pseudo-component fluxes were analyzed regarding resulting weld aspects, microstructures, properties corrosion resistance joints. Using mixing design available Minitab 17 software, obtained optimal was composed 74% SiO2, 3% Fe2O3, 13% Cr2O3 10% NaF. During investigation, carried out using combination with activated tungsten inert gas (ATIG) evaluated compared another executed conventional (TIG) process. conclusion, we observed ATIG had beneficial effects on without degrading when TIG weld. Moreover, process, depth achieved single pass, while edge preparation or addition filler metal not required.