Effect of TIG and activated flux TIG welding processes on weld bead geometry, microstructure, and hardness of SAF 2507 grade super duplex stainless steel joints

Abstract Tungsten inert gas (TIG) welding is frequently used to fabricate super duplex stainless steel weldments due its superior mechanical qualities and attractive appearance in contrast with other arc techniques. The broad use of TIG remains constrained despite all advantages. Thus, the process activated flux tungsten (A-TIG) created. In current study, ATIG different oxide fluxes execute bead-on-plate on 6 mm thick (SS) SAF 2507 grade. processes are for welding, macrostructure, microstructure, features DSS weld beads analysed. When used, A-TIG technique achieves a greater depth penetration narrower bead width than standard process. SiO 2 gives highest (5.42 mm) among used. Also, using has finer grain structure higher hardness value fluxes. primary microstructure zone was austenitic, but delta ferrite still present.