On the stability of the passive Ti-6Al-4V film of friction stir welds with stainless steel: Effect of not native metal species

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Autor(es): dc.contributorUniversidade Federal de São Carlos (UFSCar)-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorSolid State Joining Processes (WMP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorSilva, Diego D.-
Autor(es): dc.creatorCampanelli, Leonardo Contri-
Autor(es): dc.creatorBergmann, Luciano-
Autor(es): dc.creatordos Santos, Jorge F.-
Autor(es): dc.creatorHammer, Peter [UNESP]-
Autor(es): dc.creatorRovere, Carlos A. Della-
Autor(es): dc.creatorAquino, José M.-
Data de aceite: dc.date.accessioned2022-02-22T00:35:16Z-
Data de disponibilização: dc.date.available2022-02-22T00:35:16Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-10-19-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.electacta.2020.136900-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/202039-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/202039-
Descrição: dc.descriptionMechanical and microstructural characteristics of Ti-6Al-4V/stainless steel (SS) dissimilar friction stir welds have been well described in the literature; however, little is known about the electrochemical properties of such welds in terms of the passive film stability of TiO2 grown in oxidizing media. To clarify this issue, potentiodynamic polarization, cyclic voltammetry, and electrochemical impedance measurements were carried out in the Ti-6Al-4V alloy to analyze the effects of Fe and Cr contamination from the underlying SS on the passive film stability of TiO2 in concentrated (6.0 and 11.5 mol L–1) HNO3 solutions. Lower transpassive potentials were observed for samples in the stirred zone (SZ) than those of the base metal (BM) due to Fe and Cr contamination. Anodic charges obtained during cyclic voltammetry using 6.0 mol L–1 HNO3 showed that the grown passive film was completely dissolved and regrown after consecutive scans, except for the BM sample. According to the results of X-ray photoelectron spectroscopy (XPS) analyses an Al depleted layer was obtained for the latter condition, which confirms the stability of TiO2 film. The increasing values of charge transfer resistance obtained through electrochemical impedance measurements at distinct potentials in the passive region also supported the stability of the TiO2 film grown in 6.0 mol L–1 HNO3 solution. The formation of a medium frequency inductive loop and low frequency constant phase element are related to the dissolution of the oxide film and adsorption of NO3 species into the formed passive film, respectively, as evidenced by XPS analyses.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionDepartament of Chemistry Federal University of São Carlos-
Descrição: dc.descriptionInstitute of Science and Technology (ICT) Federal University of São Paulo (UNIFESP), São José dos Campos-
Descrição: dc.descriptionDepartament of Materials Engineering Federal University of São Carlos-
Descrição: dc.descriptionHelmholtz-Zentrum Geesthacht (HZG) Institute of Materials Research Materials Mechanics Solid State Joining Processes (WMP), Max-Planck-Str. 1-
Descrição: dc.descriptionSão Paulo State University (UNESP) Institute of Chemistry Department of Phyical Chemistry-
Descrição: dc.descriptionSão Paulo State University (UNESP) Institute of Chemistry Department of Phyical Chemistry-
Descrição: dc.descriptionCNPq: # 150782/2019–5-
Descrição: dc.descriptionCAPES: 1639995-
Descrição: dc.descriptionCNPq: 311163/2017–3-
Idioma: dc.languageen-
Relação: dc.relationElectrochimica Acta-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAdsorption of electrolyte species-
Palavras-chave: dc.subjectInductive loop-
Palavras-chave: dc.subjectSolid-state welding-
Palavras-chave: dc.subjectSurface reconstruction-
Palavras-chave: dc.subjectTiO2 film stability-
Título: dc.titleOn the stability of the passive Ti-6Al-4V film of friction stir welds with stainless steel: Effect of not native metal species-
Tipo de arquivo: dc.typelivro digital-
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