Joint and strength properties of PTA welded AISI 2205 steel

Abstract Duplex stainless steel, consisting of ferrite and austenite, has attracted wide attention in the past 20 years by exhibiting superior performance with excellent strength and corrosion performance. In this study, 2205 type steel joints were manufactured by plasma arc welding technique. The structure and strength properties of the joints were detected through scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), elemental mapping, tensile test, X-ray diffraction (XRD), and microhardness evaluations. Fractographic analysis was carried out utilizing SEM. The plasma arc welding (PAW) process resulted in a limited heat-affected zone and achieved a high depth-to-width penetration ratio. Moreover, this technique helped maintain the ferrite and austenite phases within the desired ranges. The maximum tensile strength was detected as 455 MPa in S3 Sample. A ductile fracture pattern appeared in the weld metal.