Análise do comportamento em fadiga do recobrimento de uma liga zinco-níquel como substituição ao cádmio eletrodepositado para o aço AISI 4140

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dc.contributor.advisorVelloso, Verônica Mara de Oliveira [UNESP]
dc.contributor.advisorVoorwald, Herman Jacobus Cornelis [UNESP]
dc.contributor.authorFernandes, Martin Ferreira [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2021-03-10T12:58:00Z
dc.date.available2021-03-10T12:58:00Z
dc.date.issued2018-11-21
dc.description.abstractStuds are applied in the Brazilian petrochemical industry to join together flanges or equipment connectors in marine environments, where fluctuations of the tensile stress at the studs occur due to the variation of the pressure in the oil well or due to the ocean waves movement, causing the fatigue mechanism. Due to the corrosive operating environments, frequently the studs undergo a cadmium electrodeposition process. However, cadmium is harzadous to the environment and to human health. Anticorrosive coatings influence the fatigue resistance, and its influence has to be evaluated in order to ensure structural integrity. The feasibility with respect to the fatigue behavior of the substitution of electrodeposited cadmium for a zinc-nickel alloy on AISI 4140 steel was investigated in this work. The fatigue behavior comparation was made through the analysis of AISI 4140 steel S-N curves in axial fatigue for studs, specimens in accordance with standard, and threaded specimens. The Weibull distribution was used to perform the statistical analysis of the fatigue behavior. The finite element analysis was used to quantify the stress concentration. The optical and scanning electron microscopies were used to perform the microstructure and fracture surface analysis, respectively. The stress concentration effect due to the threads of the studs had more influence than the cadmium or zinc-nickel coatings in the fatigue behavior of AISI 4140 steel. The material covered with electrodeposited cadmium presented a similar fatigue behavior to the base material, which can be attributed to dehydrogenation treatment. The material covered with a zinc-nickel alloy presented a small increase in the axial fatigue resistance, which may be related to a lower tensile residual stress value than the presented by the base material. The substitution of the ... (Complete abstract click electronic access below)en
dc.format.extent91f.
dc.identifier.aleph990009189610206341
dc.identifier.citationFERNANDES, Martin Ferreira. Análise do comportamento em fadiga do recobrimento de uma liga zinco-níquel como substituição ao cádmio eletrodepositado para o aço AISI 4140. 2018. 91f. Trabalho de conclusão de curso (Bacharelado em Engeharia Mecânica) - Universidade Estadual Paulista, Faculdade de Engenharia de Guaratinguetá, 2018.
dc.identifier.filehttp://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2019-10-22/000918961.pdf
dc.identifier.urihttp://hdl.handle.net/11449/203688
dc.publisherUniversidade Estadual Paulista (Unesp)
dc.rights.accessRightsAcesso aberto
dc.sourceAlma
dc.subjectAço - Fadigapt
dc.subjectRevestimentospt
dc.subjectCorrosão e anticorrosivospt
dc.subjectSteel Fatiguept
dc.titleAnálise do comportamento em fadiga do recobrimento de uma liga zinco-níquel como substituição ao cádmio eletrodepositado para o aço AISI 4140pt
dc.title.alternativeFatigue behavior analysis of the coating of a zinc nickel alloy as a replacement for electroplated cadmium for AISI 4140 steelen
dc.typeTrabalho de conclusão de curso
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Guaratinguetápt
unesp.undergraduateEngenharia Mecânica - FEGpt

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Guaratinguetá - FEG - Faculdade de Engenharia e Ciências