Influence of Different Frequency Pulse on Weld Bead Phase Ratio in Gas Tungsten Arc Welding by Ferritic Stainless Steel AISI-409L

The objective of the present experimental work is to obtain an appropriate welding parameter on pulsed current gas tungsten arc (GTAW) ferritic stainless steel AISI 409L with a thickness 4.5 mm. Frequency affected penetration, and ratio bead width penetration (aspect ratio) main research. A Taguchi L9 orthogonal array three level four factors was chosen execute plate welding. It leads optimize input process parameters effect plot via analysis variance, it has imposed determine their contribution each respect responses. optimized conditions for butts weld TIG its surface morphology, mechanical characteristics investigated. full optimal aspect accomplished using high-frequency pulsing, according findings. properties were characterized Vickers microhardness tensile tests base material metals. Microstructural study revealed that these variables have greater impact profile. Pulsed showed maximum UTS 445 MPa minimum 385 MPa, average samples 415 MPa. metal in all zones had influenced superior strength (UTS) as compared metal, obtained strain percentage both butt welds, however, smaller than parent metal. formation martensitic attributed higher minimized ductility welds. Furthermore, results hardness are concurrence experiments, zone fusion Corrosion behavior welded specimen analyzed potentio-dynamic polarization technique. electrochemical confirmed overall corrosion resistance better other zones.