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Fatigue crack growth behaviour in Ti6Al4V alloy specimens produced by selective laser melting

2019-12-20Journal article Restricted access
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datacite.subject.fosCiências Naturais::Matemáticas
datacite.subject.fosEngenharia e Tecnologia::Engenharia Mecânica
datacite.subject.fosEngenharia e Tecnologia::Engenharia dos Materiais
dc.contributor.authorJesus, J. S.
dc.contributor.authorBorrego, L. P.
dc.contributor.authorFerreira, J. A. M.
dc.contributor.authorCosta, J. D.
dc.contributor.authorCapela, C.
dc.date.accessioned2025-09-19T15:13:21Z
dc.date.available2025-09-19T15:13:21Z
dc.date.issued2019-12-20
dc.description.abstractThe current study presents the fatigue crack growth behaviour of titanium alloy Ti6Al4V parts manufactured by selective laser melting (SLM), obtained as standard 6 mm thick compact specimens (CT). Both the crack propagation under constant amplitude loading and the transient crack growth behaviour after the application of overloads were studied. The effect of the mean stress and the transient retardation behaviour were analysed using the crack closure parameter, obtained both by compliance and digital image correlation techniques. A reduced crack closure level for the stress ratio R = 0 was detected and for R = 0.4 no crack closure was observed. The digital image correlation technique showed better results in the Paris regime and during the transient retardation behaviour. The overload application produced crack growth retardation due to the increase of the crack closure effect. The failure surfaces showed a transgranular crack growth in β phase contouring the martensitic α phase.eng
dc.description.sponsorshipThe authors would like to acknowledge the sponsoring under the Project No. 028789, financed by the European Regional Development Fund (FEDER), through the Portugal-2020 program (PT2020 and also acknowledge the Project No. 042536-18/SI/2018, financed by European Funds, through program COMPETE2020, under the Eureka smart label S0129-AddDies.
dc.identifier.citationJesus, J.S., Borrego, L.P., Ferreira, J.A.M. et al. Fatigue crack growth behaviour in Ti6Al4V alloy specimens produced by selective laser melting. Int J Fract 223, 123–133 (2020). https://doi.org/10.1007/s10704-019-00417-2.
dc.identifier.doi10.1007/s10704-019-00417-2
dc.identifier.eissn1573-2673
dc.identifier.issn0376-9429
dc.identifier.urihttp://hdl.handle.net/10400.8/14098
dc.language.isoeng
dc.peerreviewedyes
dc.publisherSpringer Nature
dc.relation.hasversionhttps://link.springer.com/article/10.1007/s10704-019-00417-2
dc.relation.ispartofInternational Journal of Fracture
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectAdditive manufacturing
dc.subjectFatigue crack growth
dc.subjectOverloads
dc.subjectCrack closure
dc.subjectTitanium Ti6Al4V alloy
dc.titleFatigue crack growth behaviour in Ti6Al4V alloy specimens produced by selective laser meltingeng
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage133
oaire.citation.startPage123
oaire.citation.titleInternational Journal of Fracture
oaire.citation.volume223
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameCapela
person.givenNameCarlos
person.identifier.ciencia-id9B1E-6857-3D6B
person.identifier.orcid0000-0003-3334-4945
person.identifier.ridG-6395-2016
person.identifier.scopus-author-id7801358401
relation.isAuthorOfPublication9b079aa3-b79b-4395-b081-1f23d6a17514
relation.isAuthorOfPublication.latestForDiscovery9b079aa3-b79b-4395-b081-1f23d6a17514

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The current study presents the fatigue crack growth behaviour of titanium alloy Ti6Al4V parts manufactured by selective laser melting (SLM), obtained as standard 6 mm thick compact specimens (CT). Both the crack propagation under constant amplitude loading and the transient crack growth behaviour after the application of overloads were studied. The effect of the mean stress and the transient retardation behaviour were analysed using the crack closure parameter, obtained both by compliance and digital image correlation techniques. A reduced crack closure level for the stress ratio R = 0 was detected and for R = 0.4 no crack closure was observed. The digital image correlation technique showed better results in the Paris regime and during the transient retardation behaviour. The overload application produced crack growth retardation due to the increase of the crack closure effect. The failure surfaces showed a transgranular crack growth in β phase contouring the martensitic α phase.
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