The effect of hydrogen on the fracture toughness of friction-stir welded API 5L X70 pipeline steels

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Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversitat Politècnica de Catalunya-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade Estadual de Ponta Grossa (UEPG)-
Autor(es): dc.creatorGiarola, Joseane M.-
Autor(es): dc.creatorAvila, Julian A.-
Autor(es): dc.creatorCintho, Osvaldo M.-
Autor(es): dc.creatorPinto, Haroldo C.-
Autor(es): dc.creatorOliveira, Marcelo F. de-
Autor(es): dc.creatorBose Filho, Waldek W.-
Data de aceite: dc.date.accessioned2025-08-21T21:21:05Z-
Data de disponibilização: dc.date.available2025-08-21T21:21:05Z-
Data de envio: dc.date.issued2023-03-01-
Data de envio: dc.date.issued2023-03-01-
Data de envio: dc.date.issued2022-10-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1111/ffe.13799-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/240728-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/240728-
Descrição: dc.descriptionThe hydrogen embrittlement (HE) leads to severe steel degradation of mechanical properties. The hydrogen atoms diffuse into the steel and get positioned into reversible and irreversible trap sites. The pipe to transport oil and gas needs to be welded to construct long-distance pipeline projects; thus, friction-stir welding (FSW) has proven an excellent alternative to joining these pipelines. Therefore, this work assessed and analyzed the influence of hydrogen on the microstructure and fracture toughness of API 5L X70 steel welded by friction-stir welding. The in-service conditions were simulated by charging the specimen electrolytically in a 3.5% NaCl water solution with an intensity current of 2 mA·cm−2. According to fracture toughness tests, the base metal (BM) was more affected by hydrogen embrittlement than the friction-stir zone (SZ), with a fracture toughness reduction of 20% after hydrogen charging. The SZ fracture toughness did not statistically show changes in hydrogen charging by the used times; however, the fracture mechanism changed from ductile to brittle-like after 4 days of charging. The SZ depicted a better fracture toughness than BM due to the bainitic microstructure, a significant amount of irreversible hydrogen trapping.-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionSão Carlos School of Engineering (EESC) University of São Paulo (USP)-
Descrição: dc.descriptionDepartment of Strength of Materials and Structural Engineering Barcelona School of Engineering (ETSEIB) Universitat Politècnica de Catalunya-
Descrição: dc.descriptionCampus of São João da Boa Vista São Paulo State University (UNESP)-
Descrição: dc.descriptionState University of Ponta Grossa (UEPG)-
Descrição: dc.descriptionCampus of São João da Boa Vista São Paulo State University (UNESP)-
Descrição: dc.descriptionCNPq: 165065/2017-6-
Formato: dc.format3009-3024-
Idioma: dc.languageen-
Relação: dc.relationFatigue and Fracture of Engineering Materials and Structures-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAPI 5L X70-
Palavras-chave: dc.subjectfracture toughness-
Palavras-chave: dc.subjectfriction-stir welding-
Palavras-chave: dc.subjecthydrogen charging-
Palavras-chave: dc.subjecthydrogen embrittlement-
Título: dc.titleThe effect of hydrogen on the fracture toughness of friction-stir welded API 5L X70 pipeline steels-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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