Heat Input Effect on Dissimilar Super Duplex Stainless Steel (UNS S32750) and Nitronic Steel (N 50) Gas Tungsten Arc Weld: Mechanism, Microstructure, and Mechanical Properties

Maurya, Anup Kumar; Chhibber, Rahul; Pandey, Chandan

doi:10.1007/s11665-022-07471-3

Cited by 14 publications

(5 citation statements)

References 57 publications

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“…Failure of the weld joint results in a substantial waste of money and resources, as well as a danger to human life [3]. Modern industrial applications have increasingly used dissimilar joining by fusion welding of the highest quality DSS (2205) and ASS grades, principally for financial and technical reasons [4]. Many countries worldwide are looking for corrosion-resistant stainless-steel environments for offshore and onshore applications.…”

Section: Introductionmentioning

confidence: 99%

Wettability study of Developed Silicon based SMAW Electrode Coating Fluxes using SiO 2 -CaO-TiO 2 and SiO 2 -CaO-MgO Ternary System

Mishra,

Sharma,

Chhibber

2023

Preprint

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The current research aims to develop and investigate the wettability behaviour of the fluxes used to coat shielded metal arc welding electrodes for offshore applications. Weld characteristics on duplex stainless steel are significantly affected by the flux's wettability characteristics. The wetting properties of SMAW electrode coatings were measured using the sessile drop technique. Twenty-six flux constituents of coatings have been formulated using the mixture design approach. At a temperature of 1423 K, the contact angle, spread area, surface tension, and adhesion work are measured. X-ray diffraction (XRD) analytical techniques and Fourier transform infrared spectroscopy (FTIR) analysis were employed to determine the phases present in various types of fluxes. The influence of electrode coating flux compositions on different wetting parameters was examined using statistical models. It was observed that CaO, SiO2, and TiO2 individually have an increasing impact on contact angle, whereas MgO has a decreasing effect. CaO.MgO, SiO2.MgO, and TiO2.MgO is the only binary constituent increasing the contact angle. CaO and TiO2 exhibit increasing impacts, whereas SiO2 and MgO have a decreasing impact on the spread area. CaO.SiO2, SiO.TiO2, SiO.MgO, and TiO2.MgO interactions have increasing effects, while other binary interactions show decreasing effects on the spread area. Individual constituents have a positive effect on surface tension. MgO is the only constituent that increases the work of adhesion, and other constituents decrease it. Interactions like CaO, SiO2, CaO, TiO2, and SiO2.TiO2 has an increasing impact on adhesion work, while other binary interactions show a negative effect. Utilizing an artificial neural network approach, the mean square error (MSE) and mean absolute percentage error (MAPE) values for the predicted outcome were effectively minimized. ANN model prediction was compared to regression prediction.

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Section: Introductionmentioning

confidence: 99%

Wettability study of Developed Silicon based SMAW Electrode Coating Fluxes using SiO 2 -CaO-TiO 2 and SiO 2 -CaO-MgO Ternary System

Mishra,

Sharma,

Chhibber

2023

Preprint

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“…Oil and gas extraction from deep ocean waters is demanding increasingly unique technologies and materials. As an important resource which has been widely used for the transport of fluids and instrumenting systems on offshore platforms, flexible pipelines are complex structures with multiple layers whose number and type depend on the specific design requirements [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, in its manufacture, metallic strips of stainless steel of different classes are used including the UNS S31803 steel depending on the severity of the fluid to be transported. In the specific case of oil, it will depend on the type of productive well, particularly corrosive aspects of the oil withdrawn from this well [1,2].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Pulsed Arc Parameters on the Tig Welding Process for the Stainless Steel Duplex UNS S31803

Generoso,

Souza,

Pereira

et al. 2023

Materials

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The influence of parameters involved in the pulsed electric arc, used as an energy source in the tungsten inert gas (TIG)-mediated welding of Duplex UNS S31803 stainless steel, to attend the manufacture of flexible pipes for the extraction of oil and gas is presented. A fundamental part in the manufacturing process of flexible pipelines is the welding of these strips so that corresponding TIG welds will be subjected to the same process and work conditions. Therefore, it is necessary to maintain the same properties in the welded regions. Covering the effects of each parameter of the pulsed electric arc such as peak and base current as welds, cyclic ratio, and pulsation frequency is a desirable endeavor. The final objective is the mitigation of problems that have a great impact on production, such as weld breakage during the conformation of the strip in the process and test failures. With this, tensile, bending, and ferrite percentage tests were performed on 12 samples that qualified as satisfactory in the visual aspect. A minimum tensile strength of 734.57 MPa and a maximum of 775.77 MPa were obtained where all values found are above the tensile strength limit of the base material of 620 MPa. With the completion of the study, it is possible to understand not only the response of the process to each parameter but also the tendency when changing them. Moreover, it is possible to explore the possibility of guiding the changes to achieve results about the visual aspect and the mechanical properties of the welded material.

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“…The chemical composition for duplex stainless steel (DSS) contains Cr, Mo, Ni, and N, in addition, the alloying elements distribution of duplex stainless steel (DSS) are inhomogeneous, whereas Cr and Mo are leads to an increase in the ferrite volume fraction, Ni and N increase the austenite volume fraction. The key factor to influence ferrite volume fraction and intermetallic phases precipitation (harmful phases)such as the sigma (σ) phase, chi (χ) phase, secondary austenite (γ2), nitride (CrN and Cr2N), carbides (M 23 C 6 ) are annealing temperature, cooling rate, solidification after the welding process [3][4][5][6][7][8] and heat input [8][9][10] .…”

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confidence: 99%

Effect of heat treatment atmospheres on microstructure evolution and corrosion resistance of 2205 duplex stainless steel weldments

Mohamed

Hamid

et al. 2023

Sci Rep

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The effects of post heat treatment atmosphere on microstructure and corrosion resistance of duplex stainless steel welded joints were investigated. Post weld heat treatment (PWHT) was carried out with and without protective atmospheres. Nitrogen and argon are used as protective gases individually. Detailed microstructure examination (optical and SEM) demonstrates that nitrides precipitates are highly observed in the welded zones for nitrogen protected samples. An observed drop of ferrite volume fraction in post weld heat treated samples compared with welded samples without heat treatment leading to corrosion resistance enhancement of heat treated welded joints. An exception for using nitrogen as heat treatment atmosphere a decreased corrosion resistance of weldments is investigated due to nitride precipitates. An increase in the weld zone hardness for post weld heat treated samples compared with base alloy. The initial hardness of duplex stainless steel was 286 Hv while average hardness of weld zone was 340, 411, 343, and 391 Hv for as welded, PWHT using air, argon, and nitrogen atmospheres, respectively. Weld zone hardness increased to 33, 44, 20, and 37%. A significant decrease in the ultimate tensile strength and elongation after PWHT. The initial Ultimate tensile strength duplex stainless steel base material was 734.9 MPa while Ultimate tensile strength of the welded joints was 769.3, 628.4, 737.8, and 681.4 MPa for the following conditions: as welded, PWHT using air, argon, and nitrogen atmospheres, respectively.

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Heat Input Effect on Dissimilar Super Duplex Stainless Steel (UNS S32750) and Nitronic Steel (N 50) Gas Tungsten Arc Weld: Mechanism, Microstructure, and Mechanical Properties

Cited by 14 publications

References 57 publications

Wettability study of Developed Silicon based SMAW Electrode Coating Fluxes using SiO 2 -CaO-TiO 2 and SiO 2 -CaO-MgO Ternary System

Wettability study of Developed Silicon based SMAW Electrode Coating Fluxes using SiO 2 -CaO-TiO 2 and SiO 2 -CaO-MgO Ternary System

Influence of Pulsed Arc Parameters on the Tig Welding Process for the Stainless Steel Duplex UNS S31803

Effect of heat treatment atmospheres on microstructure evolution and corrosion resistance of 2205 duplex stainless steel weldments

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