Effect of welding conditions and flux compositions on the metallurgy of welded duplex stainless steel

Omiogbemi, Ibrahim Momoh‐Bello; Pandey, Sunil; Yawas, Danjuma Saleh; Afolayan, Matthew Olatunde; Dauda, E.T.

doi:10.1016/j.matpr.2021.06.161

Cited by 4 publications

(3 citation statements)

References 12 publications

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“…However, the presence of numerous inclusions in FCAW welds significantly reduces low-temperature toughness and corrosion resistance. [11,12] Recently, high-energy density welding techniques such as electron beam and laser beam welding have been explored for joining DSS due to their high productivity and low distortion. [13][14][15] Nevertheless, these methods may lead to excessive ferritization and the formation of secondary phases, impacting the welded joint's low-temperature toughness and corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Study on Microstructure and Properties of Cold Metal Transfer and Pulse Hybrid Welded Super Duplex Stainless Steel

Zhang,

He,

et al. 2024

steel research int.

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The investigation focuses on the microstructure, impact toughness, and pitting corrosion resistance of cold metal transfer and pulse hybrid welded joints of unified numbering system (UNS) S32750 duplex stainless steel. The results show that the filler pass exhibits the highest austenite ratio (47.9%), whereas the heat‐affected zone (HAZ) shows the lowest (32.3%). Notably, secondary austenite (γ2) is present in both the backing pass and HAZ, but conspicuously absent in the filler pass, indicating that reheating from subsequent weld pass is a prerequisite for the precipitation of γ2. Additionally, chromium nitride (Cr2N) also precipitates in the HAZ and backing pass. Comparative analysis with the weld metal (WM) and base metal (BM) indicates that the HAZ displays lower impact toughness, primarily attributing to imbalanced phase ratio, coarse ferrite grains and the brittle Cr2N. Owing to the lower austenite content and Cr2N precipitation in the backing pass, its toughness (122.6 J cm−2) is found to be inferior to that of the filler pass (130.1 J cm−2). Furthermore, the HAZ with a lower critical pitting temperature compared to the WM (79.1 °C) and BM (87 °C), and exhibits the worst pitting corrosion resistance due to the abundant precipitation of secondary phases and excessive ferrite with low pitting resistance equivalent number.

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Section: Introductionmentioning

confidence: 99%

Study on Microstructure and Properties of Cold Metal Transfer and Pulse Hybrid Welded Super Duplex Stainless Steel

Zhang,

He,

et al. 2024

steel research int.

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“…The processes of interaction of phases occurring at various stages of heating and melting of the electrode determine their final composition. [15,16]. The transition processes of individual elements were investigated based on a comparison of the initial composition and composition of the deposited metal [17,18].…”

Section: Introductionmentioning

confidence: 99%

Modelling the Chemical Composition Process Concerning Formation of Metals From Manual Arc Surface on the Basis of the Electrode Coating Charge Components Classification

2022

IJOMAM

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The topic of the article is modelling the process of forming the chemical composition of metal during manual arc surfacing based on the classification of the components of the electrode coating charge. The subject of research is the chemical composition of the metal obtained as a result of the manual arc surfacing process. The article discusses a mathematical model of manual arc surfacing, based on the classification of the components of the electrode coating during manual arc surfacing, describing the process using equations that take into account the transition of elements from the rod and electrode coating to the slag and metal baths, as well as their losses and gains due to burning out, oxidation and reduction. The research methods are based on: mathematical modelling of physical and chemical processes occurring during manual arc surfacing allows to establish of the correspondence of the developed model to real processes based on determining the convergence of experimental and calculated values. The proposed technique makes it possible to evaluate the composition of the deposited metal during surfacing with coated electrodes and the transition coefficients of the elements.

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“…Several welding techniques, including laser welding, tungsten inert gas (TIG) welding, plasma arc welding, friction welding, electron beam welding, gas metal arc welding, etc., are used for the welding of DSS. All the techniques have their limitations and advantages [21,[26][27][28][29][30][31][32]. During the welding process, variation in composition and microstructure takes place in the FZ, which may reduce the corrosion resistance of DSS.…”

Section: Introductionmentioning

confidence: 99%

Ameliorative Corrosion Resistance and Microstructure Characterization of 2205 Duplex Stainless Steel by Regulating the Parameters of Pulsed Nd:YAG Laser Beam Welding

Abdo

Seikh

Mohammed

et al. 2021

Metals

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Welding parameters can greatly affect the final product. In this study, there was a variation given on the pulse energy, i.e., heat input parameters. The microstructure was analyzed and presented in relation to the efficiency of corrosion. The microstructural study showed the changes of the fusion zone (FZ) and the heat-affected zone (HAZ) with an increase in pulse energy. The development of a prominent austenite process on the weld material had a prolonged effect on its corrosion resistance property. Electrochemical impedance spectroscopy (EIS) and potentiodynamic measurements were used to test the electrochemical activity of laser-weld 2205 duplex stainless steel in an aqueous 3.5% NaCl solution. Finally, the findings of the EIS analysis were supported by Raman spectroscopy. Based on the obtained results, the 2205 duplex stainless steel (DSS) weld obtained at a higher pulse energy showed higher corrosion resistance than the welded sample obtained at a low pulse energy. The impedance spectroscopy confirmed a smooth surface property with an increase in the pulse energy and the presence of an oxide layer, a finding also confirmed by the Raman spectroscopy measurements.

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Effect of welding conditions and flux compositions on the metallurgy of welded duplex stainless steel

Cited by 4 publications

References 12 publications

Study on Microstructure and Properties of Cold Metal Transfer and Pulse Hybrid Welded Super Duplex Stainless Steel

Study on Microstructure and Properties of Cold Metal Transfer and Pulse Hybrid Welded Super Duplex Stainless Steel

Modelling the Chemical Composition Process Concerning Formation of Metals From Manual Arc Surface on the Basis of the Electrode Coating Charge Components Classification

Ameliorative Corrosion Resistance and Microstructure Characterization of 2205 Duplex Stainless Steel by Regulating the Parameters of Pulsed Nd:YAG Laser Beam Welding

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