Residual stress influence on fatigue lifetimes of electroplated AISI 4340 high strength steel

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dc.contributor.authorVoorwald, H. J. C.
dc.contributor.authorRocha, P. C. F.
dc.contributor.authorCioffi, M. O. H.
dc.contributor.authorCosta, M. Y. P.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:28:08Z
dc.date.available2014-05-20T13:28:08Z
dc.date.issued2007-11-01
dc.description.abstractResidual stresses play an important role in the fatigue lives of structural engineering components. In the case of near surface tensile residual stresses, the initiation and propagation phases of fatigue process are accelerated; on the other hand, compressive residual stresses close to the surface may increase fatigue life. In both decorative and functional applications, chromium electroplating results in excellent wear and corrosion resistance. However, it is well known that it reduces the fatigue strength of a component. This is due to high tensile internal stresses and microcrack density. Efforts to improve hard chromium properties have increased in recent years. In this study, the effect of a nickel layer sulphamate process, as simple layer and interlayer, on fatigue strength of hard chromium electroplated AISI 4340 steel hardness - HRc 53, was analysed. The analysis was performed by rotating bending fatigue tests on AISI 4340 steel specimens with the following experimental groups: base material, hard chromium electroplated, sulphamate nickel electroplated, sulphamate nickel interlayer on hard chromium electroplated and electroless nickel interlayer on hard chromium electroplated. Results showed a decrease in fatigue strength in coated specimens and that both nickel plating interlayers were responsible for the increase in fatigue life of AISI 4340 chromium electroplated steel. The shot peening pre-treatment was efficient in reducing fatigue loss in the alternatives studied.en
dc.description.affiliationUNESP, FEG, Dept Mat & Technol, Fatigue & Aeronaut Mat Res Grp, BR-12516410 Guaratingueta, SP, Brazil
dc.description.affiliationUnespUNESP, FEG, Dept Mat & Technol, Fatigue & Aeronaut Mat Res Grp, BR-12516410 Guaratingueta, SP, Brazil
dc.format.extent1084-1097
dc.identifierhttp://dx.doi.org/10.1111/j.1460-2695.2007.01178.x
dc.identifier.citationFatigue & Fracture of Engineering Materials & Structures. Oxford: Blackwell Publishing, v. 30, n. 11, p. 1084-1097, 2007.
dc.identifier.doi10.1111/j.1460-2695.2007.01178.x
dc.identifier.issn8756-758X
dc.identifier.lattes3511534795805776
dc.identifier.lattes6119671014416126
dc.identifier.urihttp://hdl.handle.net/11449/9334
dc.identifier.wosWOS:000250145500009
dc.language.isoeng
dc.publisherBlackwell Publishing
dc.relation.ispartofFatigue & Fracture of Engineering Materials & Structures
dc.relation.ispartofjcr2.533
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectAISI 4340pt
dc.subjectfatiguept
dc.subjecthard chromiumpt
dc.subjectnickelpt
dc.subjectshot peeningpt
dc.titleResidual stress influence on fatigue lifetimes of electroplated AISI 4340 high strength steelen
dc.typeArtigo
dcterms.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dcterms.rightsHolderBlackwell Publishing
unesp.author.lattes3511534795805776
unesp.author.lattes6119671014416126
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Guaratinguetápt

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