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dc.contributor.authorHazarabedian, M.S.
dc.contributor.authorViereckl, Andy
dc.contributor.authorQuadir, Z.
dc.contributor.authorLeadbeater, G.
dc.contributor.authorGolovanevskiy, Vladimir
dc.contributor.authorErdal, S.
dc.contributor.authorGeorgeson, P.
dc.contributor.authorIannuzzi, Mariano
dc.date.accessioned2020-06-17T04:56:46Z
dc.date.available2020-06-17T04:56:46Z
dc.date.issued2019
dc.identifier.citationHazarabedian, M.S. and Viereckl, A. and Quadir, Z. and Leadbeater, G. and Golovanevskiy, V. and Erdal, S. and Georgeson, P. et al. 2019. Hydrogen-induced stress cracking of swaged super duplex stainless steel subsea components. Corrosion. 75 (7): pp. 824-838.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/79630
dc.identifier.doi10.5006/3192
dc.description.abstract

A recent subsea failure of two subsea connectors made of UNS S32760, a 25 wt% Cr super duplex stainless steel, led to an extensive root cause failure analysis. The components showed a single longitudinal crack along a swaged section, which arrested toward its thicker end. The brittle nature of the fracture surface, calcareous deposits on the component, and exposure to cathodic protection suggested hydrogen-induced stress cracking—a form of environmentally assisted cracking—as a plausible failure mechanism. Thus, the three causative factors promoting hydrogen-induced stress cracking, namely, a susceptible microstructure, a hydrogen bearing environment, as well as sufficiently high applied and residual stresses in the material were the focus of this investigation. This work details the material characterization work and presents a possible failure mechanism. The results showed that the failure developed from a combination of factors, typical for hydrogen-induced stress cracking. The measured hydrogen content in parts of the material exceeded 40 ppm, more than an order of magnitude higher than what is normally expected in super duplex stainless steels. Additionally, a highly anisotropic, coarse microstructure was observed, which in combination with the introduced cold-work from the swaging process and potential stress raisers from design and machining could have facilitated crack initiation, ultimately leading to the failure of the component. This hypothesis was reinforced by the presence of secondary cracks along the main, brittle fracture surface. Furthermore, mechanical testing results showed a detrimental effect on the material’s properties due to the presence of residual hydrogen and the swaging operation.

dc.languageEnglish
dc.publisherNATL ASSOC CORROSION ENG
dc.subjectScience & Technology
dc.subjectTechnology
dc.subjectMaterials Science, Multidisciplinary
dc.subjectMetallurgy & Metallurgical Engineering
dc.subjectMaterials Science
dc.subjecthydrogen embrittlement
dc.subjecthydrogen induced stress cracking
dc.subjectoil and gas
dc.subjectsubsea
dc.subjectsuper duplex stainless steel
dc.subjectEMBRITTLEMENT
dc.subjectDEFORMATION
dc.subjectTEMPERATURE
dc.subjectBEHAVIOR
dc.titleHydrogen-induced stress cracking of swaged super duplex stainless steel subsea components
dc.typeJournal Article
dcterms.source.volume75
dcterms.source.number7
dcterms.source.startPage824
dcterms.source.endPage838
dcterms.source.issn0010-9312
dcterms.source.titleCorrosion
dc.date.updated2020-06-17T04:56:45Z
curtin.departmentWASM: Minerals, Energy and Chemical Engineering
curtin.accessStatusFulltext not available
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidIannuzzi, Mariano [0000-0001-9202-3696]
curtin.contributor.researcheridIannuzzi, Mariano [A-6548-2016]
dcterms.source.eissn1938-159X
curtin.contributor.scopusauthoridGolovanevskiy, Vladimir [24400598300]
curtin.contributor.scopusauthoridIannuzzi, Mariano [8345450900]


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