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Fatigue crack growth under corrosive environments of Ti-6Al-4V specimens produced by SLM

2020-12Journal article Open access
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datacite.subject.fosEngenharia e Tecnologia
datacite.subject.fosCiências Naturais::Outras Ciências Naturais
dc.contributor.authorJesus, J. S.
dc.contributor.authorBorrego, L. P.
dc.contributor.authorFerreira, J. A. M.
dc.contributor.authorCosta, J. D.
dc.contributor.authorCapela, Carlos
dc.date.accessioned2025-07-22T16:16:28Z
dc.date.available2025-07-22T16:16:28Z
dc.date.issued2020-12
dc.descriptionArticle number - 104852
dc.description.abstractAdditive manufactured parts made of Ti-6Al-4V alloy are increasingly used in medical devices and in the aeronautical industry, because of its high strength, low weight and excellent biocompatibility. Most of these components work under environmentally assisted cyclic loading, i.e. under corrosion-fatigue. Anisotropic microstructure of additive manufactured materials significantly influences the propagation of cracks, particularly under corrosion-fatigue. This paper presents the results of the failure mode and fatigue crack propagation study in titanium Ti-6Al-4V specimens produced by selective laser melting (SLM), under corrosive ambient. Three environment solutions were used: artificial saliva, Ringer's solution and 3.5%wt NaCl solution. Tests were performed using standard 6 mm thick compact specimens (CT) tested at R = 0.05 with frequencies of 1 and 10 Hz. The main objective was to study the effect of the corrosion potential on da/dN-ΔK curves and on the fatigue failure mechanisms. It was observed a very important accelerating effect on the crack initiation and fatigue crack propagation for tests under corrosion ambient, particularly for 3.5%wt NaCl solution, for which fatigue crack growth is 3.3 times higher in comparison with inert ambient tests.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), under the Regional Operational Program of the Center (CENTRO-01-0145-FEDER-028789), and the project POCI-01-0247-FEDER-042536, financed by European Funds, through program COMPETE2020, under the Eureka smart label S0129-AddDies. Finally, acknowledge the Foundation for Science and Technology IP/ MCTES through national funds (PIDDAC).
dc.identifier.citationJ.S. Jesus, L.P. Borrego, J.A.M. Ferreira, J.D. Costa, C. Capela, Fatigue crack growth under corrosive environments of Ti-6Al-4V specimens produced by SLM, Engineering Failure Analysis, Volume 118, 2020, 104852, ISSN 1350-6307, https://doi.org/10.1016/j.engfailanal.2020.104852.
dc.identifier.doi10.1016/j.engfailanal.2020.104852
dc.identifier.issn1350-6307
dc.identifier.urihttp://hdl.handle.net/10400.8/13755
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relation.hasversionhttps://www.sciencedirect.com/science/article/pii/S1350630720301874?via%3Dihub
dc.relation.ispartofEngineering Failure Analysis
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectAdditive manufacturing
dc.subjectCorrosion-fatigue
dc.subjectCrack propagation
dc.subjectTitanium TiAl6V4 alloy
dc.titleFatigue crack growth under corrosive environments of Ti-6Al-4V specimens produced by SLMeng
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage9
oaire.citation.startPage1
oaire.citation.titleEngineering Failure Analysis
oaire.citation.volume118
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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Additive manufactured parts made of Ti-6Al-4V alloy are increasingly used in medical devices and in the aeronautical industry, because of its high strength, low weight and excellent biocompatibility. Most of these components work under environmentally assisted cyclic loading, i.e. under corrosion-fatigue. Anisotropic microstructure of additive manufactured materials significantly influences the propagation of cracks, particularly under corrosion-fatigue. This paper presents the results of the failure mode and fatigue crack propagation study in titanium Ti-6Al-4V specimens produced by selective laser melting (SLM), under corrosive ambient. Three environment solutions were used: artificial saliva, Ringer's solution and 3.5%wt NaCl solution. Tests were performed using standard 6 mm thick compact specimens (CT) tested at R = 0.05 with frequencies of 1 and 10 Hz. The main objective was to study the effect of the corrosion potential on da/dN-ΔK curves and on the fatigue failure mechanisms. It was observed a very important accelerating effect on the crack initiation and fatigue crack propagation for tests under corrosion ambient, particularly for 3.5%wt NaCl solution, for which fatigue crack growth is 3.3 times higher in comparison with inert ambient tests.
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