Mechanical characterization and simulation of PCGTAW welded thin sheet of SDSS material

Kumar, Sujeet; Vimal, K.E.K.; Karpagaraj, A.

doi:10.1016/j.matpr.2022.01.318

Cited by 3 publications

(4 citation statements)

References 27 publications

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“…However, the damage tolerance is superior to the SDSS 2507 sample welded by SMAW [70]. Additionally, it could be corroborated that the sample tempered in forced air maintains a damage tolerance within the range of values presented by [6,69,70], characteristic of an SDSS without thermal effects by welding and with thermal effects by advanced welding methods. Figure 18 shows the fracture zone of each mechanically tested sample.…”

Section: Mechanics Characterizationmentioning

confidence: 82%

“…The damage tolerance obtained can be compared with that obtained by Zhao et al [69], who obtained for a seamless SDSS 2507 alloy a PSE of 26.32 GPa%. Kumar et al [6] evaluated the mechanical response of an SDSS 2507 subjected to a pulsed current gas tungsten arc welding (PCGTAW) process obtaining a PSE of 25.92% in the welded joint. Helan et al [70] found a PSE of 27.50 GPa% in a DSS 2205 and a PSE of 12.43 GPa% in an SDSS 2207 welded by SMAW.…”

Section: Mechanics Characterizationmentioning

confidence: 99%

“…Duplex stainless steels (DSS) are key structural materials for highly demanding industrial sectors such as chemical, petrochemical, desalinization, pulp and paper, and the power industry [1][2][3][4][5]. These materials combine high mechanical response and excellent corrosion resistance, mainly due to their biphasic microstructure of austenite (γ) and ferrite (δ) in a proportion close to 50% of each phase [6,7]. However, fusion welding processes, often involved in producing industrial equipment and its maintenance, promote microstructural changes that may alter these alloys' mechanical properties and corrosion behavior [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…Several authors indicate that the best DSS performance occurs when the volume fraction of significant phases (δ/γ) is in a 50/50 ratio [2,5,6]. Nevertheless, such a narrow phase balance may not achieve the best mechanical and corrosion behavior for heavy alloyed super duplex stainless steels (SDSS) and hyper duplex stainless steels (HDSS), because secondary phases play a fundamental role in the mechanical and corrosion behavior.…”

Section: Introductionmentioning

confidence: 99%

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Exploring the Impact of Cooling Rate on Microstructural Features, Mechanical Properties, and Corrosion Resistance of a Novel Nb-Stabilized Super Duplex Stainless Steel in Shielded Metal Arc Welding

Oñate,

Torres,

Olave

et al. 2023

Crystals

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The corrosion and mechanical response produced by quenching in the welded joint of a new Nb-doped stainless steel designed by the CALPHAD method and produced by open-atmosphere casting with recycled materials were investigated to contribute to the circular economy and to establish disruptive manufacturing criteria based on metallurgical principles. The steel was initially subjected to solubilization heat treatment and partial solubilization treatment at 1090 °C to obtain an appropriate α/γ balance and carbide solubilization. It was then welded by the SMAW process, quenched, and tempered at three different cooling rates. As a result, a good fit between the phases predicted by the CALPHAD method and those observed by X-ray diffraction and scanning electron microscopy were obtained, with minor differences attributable to the precipitation and diffusion kinetics required for dissolution or nucleation and growth of the phases in the system. The forced air quenching mechanism was identified as providing an α/γ phase equilibrium equivalent to 62/38 as the most effective quenching method for achieving the optimum mechanical and corrosion response, even with the post-weld σ phase and showing superior results to those of the base metal. The outstanding mechanical and corrosion responses resulted from a proper balance of the primary phases in the duplex steel with a precipitation-strengthening mechanism. The damage tolerance obtained by forced air quenching was superior to that obtained by water and air quenching, with a PSE of 24.71 GPa% post-welding.

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Section: Mechanics Characterizationmentioning

confidence: 82%

Section: Mechanics Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Exploring the Impact of Cooling Rate on Microstructural Features, Mechanical Properties, and Corrosion Resistance of a Novel Nb-Stabilized Super Duplex Stainless Steel in Shielded Metal Arc Welding

Oñate,

Torres,

Olave

et al. 2023

Crystals

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A hybrid learning approach for modelling the fabrication of super duplex stainless steel thin joints using GTAW process

Kumar

Vimal

Khan³

et al. 2023

Int J Interact Des Manuf

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Microstructural and Corrosion Behavior of Thin Sheet of Stainless Steel-Grade Super Duplex 2507 by Gas Tungsten Arc Welding

Kumar,

E. K.

2024

SAE Int. J. Mater. Manf.

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<div>Super duplex stainless steel (SDSS) is a type of stainless steel made of chromium (Cr), nickel (Ni), and iron (Fe). In the present work, a 1.6 mm wide thin sheet of SDSS is joined using gas tungsten arc welding (GTAW). The ideal parameter for a bead-on-plate trial is found, and 0.216 kJ/mm of heat input is used for welding. As an outcome of the welding heating cycle and subsequent cooling, a microstructural study revealed coarse microstructure in the heat-affected zone and weld zone. The corrosion rate for welded joints is 9.3% higher than the base metal rate. Following the corrosion test, scanning electron microscope (SEM) analysis revealed that the welded joint’s oxide development generated a larger corrosive attack on the weld surface than the base metal surface. The percentages of chromium (12.5%) and molybdenum (24%) in the welded joints are less than those in the base metal of SDSS, as per energy dispersive X-ray (EDX) analysis. Corrosion modeling is done using the COMSOL Multiphysics software. Electrochemical corrosion modeling is used to determine the electrolyte potential (i.e., 0.09 V) and current density (i.e., 0.2 A/m<sup>2</sup> to 1.8 A/m<sup>2</sup>). An entire mesh model contains 6240 elements. The largest and smallest element sizes are 4 mm and 0.1 mm, respectively. The maximum element rate of growth is 1.2.</div>

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Mechanical characterization and simulation of PCGTAW welded thin sheet of SDSS material

Cited by 3 publications

References 27 publications

Exploring the Impact of Cooling Rate on Microstructural Features, Mechanical Properties, and Corrosion Resistance of a Novel Nb-Stabilized Super Duplex Stainless Steel in Shielded Metal Arc Welding

Exploring the Impact of Cooling Rate on Microstructural Features, Mechanical Properties, and Corrosion Resistance of a Novel Nb-Stabilized Super Duplex Stainless Steel in Shielded Metal Arc Welding

A hybrid learning approach for modelling the fabrication of super duplex stainless steel thin joints using GTAW process

Microstructural and Corrosion Behavior of Thin Sheet of Stainless Steel-Grade Super Duplex 2507 by Gas Tungsten Arc Welding

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