Hydrogen-enhanced cracking of 2205 duplex stainless steel welds

Young, M.C.; Chan, S.L.I.; Tsay, L.W.; Shin, C.S.

doi:10.1016/j.matchemphys.2004.10.042

Cited by 43 publications

(19 citation statements)

References 22 publications

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“…(5) and (6). The Burger´s Vector could be correlated to the lattice parameter (a) for both austenite (face-centered cubic lattice) and ferrite (bodycentered cubic lattice) 18 .…”

Section: (3) (4)mentioning

confidence: 99%

“…Depending on the alloy composition, the plastic deformation can take places more easily in the austenite (DSS with low alloy and N content) or ferrite (highly alloyed DSS), resulting in the initiation and propagation of stress corrosion cracks. After hydrogen-charging in DSS 2205, the ferrite is more sensitivity to cracking than austenite 6,7 .…”

Section: Introductionmentioning

confidence: 99%

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In Situ Synchrotron Radiation Measurements During Axial Strain In Hydrogen Cathodically Charged Duplex Stainless Steel SAF 2205

Hoyos

Rodrı́guez

et al. 2017

Mat. Res.

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The objective of this work is the evaluation of hydrogen effects on the martensitic transformation and strain hardening in Duplex Stainless Steels (DSS) SAF 2205 (UNS S32205/S31803). DSS are two-phase alloys (austenite and ferrite), which are used for applications requiring high mechanical strength, in corrosive environments. Therefore, it is necessary a better understanding of the phenomena involved on the hydrogen embrittlement. For this, in situ measurements of X-ray diffraction were made during tensile test in H 2 cathodically charging DSS 2205. The hydrogen charging reduces the stress relaxation, reducing the ductility and suppressing the hydrogen-induced austenitic to martensitic transformation. In addition, it also reduces the strain hardening (dislocation multiplication) in austenite. The strain hardening seems to have a higher influence than martensitic transformation on fracture process, even in absence of hydrogen.

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“…(5) and (6). The Burger´s Vector could be correlated to the lattice parameter (a) for both austenite (face-centered cubic lattice) and ferrite (bodycentered cubic lattice) 18 .…”

Section: (3) (4)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In Situ Synchrotron Radiation Measurements During Axial Strain In Hydrogen Cathodically Charged Duplex Stainless Steel SAF 2205

Hoyos

Rodrı́guez

et al. 2017

Mat. Res.

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“…As linhas verticais representam a região da linha de fusão e a distância na abscissa representa o deslocamento das medidas a partir da primeira impressão realizada no topo do metal de solda. Foram observados maiores níveis de microdureza no metal de solda em relação ao metal base, sendo que quando ocorreu variação da energia pela alteração da corrente de soldagem, as condições de menor energia apresentaram maiores níveis de microdureza, por possivelmente apresentarem maior teor de ferrita no metal de solda, pois esta fase acarreta em maior microdureza no metal de solda, sendo que a fase austenítica é mais macia e tenaz [36]. A condição soldada com maior nível de corrente apresentou um elevado pico de microdureza, próximo de 500 HV, e menores níveis de microdureza ao longo do metal de solda, devido à maior nível de diluição e possivelmente, empobrecimento de elementos de liga no metal de solda, como: nitrogênio (alta difusividade), cromo, molibdênio e níquel.…”

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Avaliação do Efeito da Energia de Soldagem na Deposição de Aço Inoxidável Superduplex pelo Processo Plasma Pó

et al. 2015

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Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution Non-Commercial, que permite uso, distribuição e reprodução em qualq'uer meio, sem restrições desde que sem fins comerciais e que o trabalho original seja corretamente citado.Recebido: 03 Mar., 2015 Aceito: 29 Jun., 2015 E-mail: nunesbar@ibest.com.br (EBN)Resumo: O processo plasma pó é um dos mais recentes na aplicação de revestimento, possuindo como principal característica o controle da diluição. A soldagem de revestimento com aços inoxidáveis superduplex é uma interessante opção para a construção e o reparo de equipamentos para aplicações em ambiente de corrosão severa, permitindo alcançar as características desejadas:resistência à corrosão e boas propriedades mecânicas. Logo, este trabalho tem como objetivo avaliar o teor de ferrita no metal de solda e as características mecânicas através de perfis de microdureza em soldagens de revestimentos de dutos de aço C-Mn com deposição de UNS S32760 depositadas pelo processo Plasma Pó. Foram realizadas soldagens em dutos com deposição de AISD, empregando três níveis de energia de soldagem, variando a velocidade ou corrente de soldagem. Posteriormente, foi feita a análise de geometria e quantificação do teor de ferrita no metal de solda e levantamento do perfil de microdureza. A variação da energia de soldagem acarretou mudanças na geometria do cordão de solda, sendo que a alteração da corrente de soldagem proporcionou alterações mais significativas. O aumento da energia acarretou na redução do teor de ferrita do metal de solda. Em relação à microdureza, apenas a condição de maior nível de corrente de soldagem apresentou níveis bastante elevados de microdureza no metal de solda. Palavras-chave:Plasma; Superduplex; Revestimento. Evaluation of the Effect of the Heat Input in the Super Stainless Steel Deposition by Powder Plasma ProcessAbstract: The powder plasma process is one of the latest on weld overlay application and it has as main feature getting the dilution control. The weld overlay with the Super Duplex Stainless Steels is an interesting alternative for the construction and repair of equipment for applications in severe corrosive medium corrosion, allowing reach the desirable characteristics: good resistance corrosion and mechanical properties. Soon, the main objective of the present work is to evaluate the ferrite content in the weld metal and mechanical properties through microhardness profile in weld overlay of C-Mn pipes with UNS S32760 deposition by powder plasma process. Three welding energy levels, varying the speed or welding current, had been carried in the pipes with SDSS deposition. Later, it had carried geometry analysis and quantification of ferrite content in the weld metal and microhardness profile survey. The variation of welding current caused changes in the geometry of weld bead, being the change of welding current provided the most significant changes. Higher levels of heat input resulted in the reduction of the ferrite content of the weld meta...

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“…Hydrogen charging occurring as a part of cathodic protection has been shown to be enough to produce hydrogen embrittlement (HE) of steels. According to the literature [7,8] ferritic stainless steels are clearly susceptible to HE while austenitic stainless steels in general exhibit less signs of HE. The resistance to HE of duplex stainless steels falls in between the resistance the ferritic and austenitic stainless steels.…”

Section: Introductionmentioning

confidence: 99%

Environmental Degradation of Dissimilar Austenitic 316L and Duplex 2205 Stainless Steels Welded Joints

Topolska¹,

Łabanowski²

2017

Archives of Metallurgy and Materials

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The paper describes structure and properties of dissimilar stainless steels welded joints between duplex 2205 and austenitic 316L steels. Investigations were focused on environmentally assisted cracking of welded joints. The susceptibility to stress corrosion cracking (SCC) and hydrogen embrittlement was determined in slow strain rate tests (SSRT) with the strain rate of 2.2 × 10 -6 s -1 . Chloride-inducted SCC was determined in the 35% boiling water solution of MgCl 2 environment at 125°C. Hydrogen assisted SCC tests were performed in synthetic sea water under cathodic polarization condition. It was shown that place of the lowest resistance to chloride stress corrosion cracking is heat affected zone at duplex steel side of dissimilar joins. That phenomenon was connected with undesirable structure of HAZ comprising of large fractions of ferrite grains with acicular austenite phase. Hydrogen assisted SCC tests showed significant reduction in ductility of duplex 2205 steel while austenitic 316L steel remains almost immune to degradation processes. SSR tests of dissimilar welded joints revealed a fracture in the area of austenitic steel.

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Hydrogen-enhanced cracking of 2205 duplex stainless steel welds

Cited by 43 publications

References 22 publications

In Situ Synchrotron Radiation Measurements During Axial Strain In Hydrogen Cathodically Charged Duplex Stainless Steel SAF 2205

In Situ Synchrotron Radiation Measurements During Axial Strain In Hydrogen Cathodically Charged Duplex Stainless Steel SAF 2205

Avaliação do Efeito da Energia de Soldagem na Deposição de Aço Inoxidável Superduplex pelo Processo Plasma Pó

Environmental Degradation of Dissimilar Austenitic 316L and Duplex 2205 Stainless Steels Welded Joints

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