Microstructure and intergranular corrosion behavior of HAZ in DP-TIG welded DSS joints

Shi, Yonghua; Cui, Shuwan; Zhu, Tao; Gu, Shuqing; Shen, Xiaoqin

doi:10.1016/j.jmatprotec.2018.02.019

Cited by 57 publications

(24 citation statements)

References 14 publications

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“…In spite of being fusion welding TIG welded joints possess comparable fatigue strength with that produced by niques, reportedly the fatigue strength of Aluminium alloy 6061-T6 welded with TIG welding was observed to be almost similar to that welded by friction stir welding [18]. Failure mode evolution investigation has revealed tion is smaller and growth rate of void is higher in TIG welded joints weldment is influenced by the environmental factors of its work envelop, the components employed in nuclear power thermal aging and the reported thermalaging time of TIG welded components employed d the yield strength of the weldment [20].…”

Section: Sewa Singh Vikas Chawla and Gurbhindersingh Brarmentioning

confidence: 95%

The Performance of TIG Welded Similar and Dissimilar Weldments under Tensile Loading, An Experimental Investigation

Sendilvelan¹,

Tjprc²

2019

IJMPERD

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Fusion welding is a widely used technique to prepare intermetallic joints of similar and dissimilar metals. Tungsten Inert Gas (TIG) welding is a popular fusion welding technique. Mechanical properties of a weldment are supposed to be an indicator of weldment quality, in present research the tensile strength of similar and dissimilar weldment of ASME SA 213 GR. T11 and BS 3059:1987 PT 1 ERW 320welded with TIG welding has been investigated. The results revealed that maximum tensile strength of dissimilar joint has been observed when welding current and gas flow rate was 110A and 10 Litre/min respectively and the specimen was preheated at 200° C. The experimental results have been statistically tested by using two way ANOVA and Multiple Regression Analysis. The mathematical predictive model has been discussed based on regression analysis.piping joints in refineries, ship building, aerospace application, nuclear power plant fabrication and repair etc. is very important. Being a versatile process, welding technique facilitates joining of almost all metals, however the selection of appropriate technique to produce maximum penetration in the metals to be welded yields good quality weld. Manual Arc Welding (MA), Metal Inert Gas (MIG) Welding and Tungsten Inert Gas (TIG) Welding techniques are among the most commonly used welding techniques [1]. TIG welding is however the most popular technique as it is capable of welding a wide variety of metals [2,3] and almost in all positions of welding [4]. TIG welding finds its applications in aerospace, automobile, marine, fabrication sector industries [5]. LITERATURE REVIEWA variety of researches have been carried out on TIG welding techniques from different aspects, some of them are discussed hereafter wherein the researchers have explored the effects of different process parameters of TIG welding on the weld quality. It is supposed that a correctly produced TIG welding joint possesses comparatively high quality than those produced by the other techniques especially in case of Stainless Steel, Aluminum, Magnesium and Copper alloys [6] and [7]. Welding current welding speed, size of tungsten electrode, Size/type of filler wire, gas flow rate etc. are some process parameters influencing the quality of joint [8]. It has

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Section: Sewa Singh Vikas Chawla and Gurbhindersingh Brarmentioning

confidence: 95%

The Performance of TIG Welded Similar and Dissimilar Weldments under Tensile Loading, An Experimental Investigation

Sendilvelan¹,

Tjprc²

2019

IJMPERD

View full text Add to dashboard Cite

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“…As a matter of fact, a chromium-rich and nitrogen-poor zone forms around chromium nitride, which promotes 2 nucleation. Chromium nitrides are found to drastically reduce the mechanical and corrosion properties of DSS and SDSS [24,25] and this is the main reason why the welding engineer should know the chromium nitrides mechanism formation, the techiques available to detect them, and take care in selecting process parameters in order to prevent their existence. However, due to their small size and low distribution, the chemical and crystallographic analysis of chromium nitrides is quite difficult and only a limited number of advanced techniques may discriminate their signal from that of the surrounding matrix.…”

Section: Fig 1 Schematic Of Chromium Nitride Precipitation In Hazmentioning

confidence: 99%

Characterization of Chromium Nitride Precipitation in the Heat Affected Zone of the Superduplex Stainless Steel Uns S32750: An Experimental and Numerical Analysis

Ferro

Fabrizi²,

Bonollo³

et al. 2021

Acta Metall Slovaca

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It is well known that pitting corrosion resistance of duplex and superduplex stainless steels strongly depends on microstructural characteristics such as ferrite/austenite proportion, presence of intermetallic phases and elemental partitioning between the austenite and ferrite phases. In particular, during the welding operation, very fine chromium nitrides may precipitate within ferrite grains of the heat affected zone drastically reducing the corrosion resistance of welded joints of duplex and super duplex stainless steels. However, due to their small size and low distribution, analyzing the chemical composition and crystallography of chromium nitrides is quite difficult and only a restricted number of advanced techniques of investigation may discriminate their signal from the surrounding matrix. This work is aimed at supporting the microstructural characterization of a welded joint of a superduplex stainless steel by means of a field-emission gun scanning electron microscope. Sub-micron chromium nitride precipitates, identified within the ferritic grains of the heat affected zone, are recognized to be the main reason for the reduced pitting corrosion resistance of the analyzed welded joints. The results are supported by a multi-pass welding process numerical simulation aimed at estimating the cooling rates promoting chromium nitride precipitation in the heat affected zone.

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“…Uma queda da fração volumétrica da ferrita se explica, pois à medida que se aumenta a energia de soldagem, diminui-se a velocidade de resfriamento de forma que há mais tempo para que a transformação ferrita/austenita se proceda. O mesmo é mostrado nos trabalhos de Fonseca et al (2016), Shi et al (2018) e Ouali et al (2019).…”

Section: Austenita (%)unclassified

Análise Quantitativa das Fases Presentes no Aço Inoxidável Duplex UNS S31803 Soldado pelo Processo MIG/MAG Curto-Circuito Convencional

2020

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Resumo Os riscos envolvidos em função de deterioração de materiais e falhas de equipamentos devido à corrosão ou à corrosão associada a solicitações mecânicas vêm cada vez mais desafiando a engenharia na busca de novos materiais, ligas, revestimentos, inibidores e novas soluções de projetos e desenhos de equipamentos que ofereçam melhor desempenho e vida útil. O aço inoxidável duplex (AID) vem conquistando cada vez mais espaço justamente por possuir tais requisitos. Atribuem-se suas altas resistências à corrosão e mecânica à sua microestrutura balanceada em aproximadamente 50% de ferrita e 50% de austenita. No presente trabalho, chapas de AID UNS S31803 foram soldadas em chanfro de 45° pelo processo MIG/MAG curto circuito convencional, utilizando-se três diferentes energias de soldagem, na faixa de 0,5-0,8 kJ/mm. Os resultados mostraram que o efeito da energia de soldagem sobre a fração volumétrica de ferrita foi bem marcante na zona termicamente afetada (ZTA) e no metal de solda este efeito não foi tão pronunciado. As propriedades mecânicas de dureza e resistência à corrosão (corrosão intergranular) foram avaliadas em função da energia de soldagem empregada. Em geral, tanto a dureza como a resistência à corrosão intergranular não sofreram influência quando as diversas condições de soldagem foram comparadas.

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Microstructure and intergranular corrosion behavior of HAZ in DP-TIG welded DSS joints

Cited by 57 publications

References 14 publications

The Performance of TIG Welded Similar and Dissimilar Weldments under Tensile Loading, An Experimental Investigation

The Performance of TIG Welded Similar and Dissimilar Weldments under Tensile Loading, An Experimental Investigation

Characterization of Chromium Nitride Precipitation in the Heat Affected Zone of the Superduplex Stainless Steel Uns S32750: An Experimental and Numerical Analysis

Análise Quantitativa das Fases Presentes no Aço Inoxidável Duplex UNS S31803 Soldado pelo Processo MIG/MAG Curto-Circuito Convencional

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