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Influence of Local Properties on Fatigue Crack Growth of Laser Butt Welds in Thin Plates of High-Strength Low-Alloy Steel

2021-08-10Artigo científico Acesso aberto
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datacite.subject.fosEngenharia e Tecnologia
datacite.subject.fosCiências Naturais::Ciências Físicas
datacite.subject.fosEngenharia e Tecnologia::Engenharia Química
datacite.subject.fosCiências Naturais::Ciências da Computação e da Informação
datacite.subject.fosCiências Naturais::Outras Ciências Naturais
datacite.subject.sdg03:Saúde de Qualidade
datacite.subject.sdg07:Energias Renováveis e Acessíveis
datacite.subject.sdg11:Cidades e Comunidades Sustentáveis
dc.contributor.authorRiofrío, Patricio G.
dc.contributor.authorJesus, Joel de
dc.contributor.authorFerreira, José A. M.
dc.contributor.authorCapela, Carlos
dc.date.accessioned2026-02-16T15:46:53Z
dc.date.available2026-02-16T15:46:53Z
dc.date.issued2021-08-10
dc.description.abstractIn this work, local properties such as hardness and fatigue crack grow rate in the heat‐affected zone of four laser‐welded butt joints in thin high‐strength low‐alloy steel were ex-amined, so as to explain and predict fatigue lives at high stress levels through the fracture mechanics approach. The different welded series presented a similar fatigue crack growth rate in the heat‐affected and fusion zones, but lower than base metal due to the higher hardness of the bainitic–martensitic microstructure verified in the welded series. The results showed that at high stress levels in the as‐welded condition, the fatigue initiation stage can be neglected and assume some types of cracks, with an initial crack of 0.07 mm and appropriate fatigue crack growth rates, estimates of fatigue life close to the experimental results were obtained.eng
dc.description.sponsorshipFunding This research is sponsored by national funds through FCT—Fundação para a Ciência e a Tecnologia, under the project UIDB/00285/2020. Acknowledgments The authors acknowledge the support provided by the Universidad de las Fuerzas Armadas-ESPE with the Ph.D. scholarship and to Mário Da Costa Martins and Fernando Meireles of the Orthopedia Médica company where the laser welding was performed.
dc.identifier.citationRiofrío, P.G.; de Jesus, J.; Ferreira, J.A.M.; Capela, C. Influence of Local Properties on Fatigue Crack Growth of Laser ButtWelds in Thin Plates of High-Strength Low-Alloy Steel. Appl. Sci. 2021, 11, 7346. https://doi.org/10.3390/app11167346.
dc.identifier.doi10.3390/app11167346
dc.identifier.eissn2076-3417
dc.identifier.urihttp://hdl.handle.net/10400.8/15652
dc.language.isoeng
dc.peerreviewedyes
dc.publisherMDPI
dc.relationCentre for Mechanical Enginnering, Materials and Processes
dc.relation.hasversionhttps://www.mdpi.com/2076-3417/11/16/7346
dc.relation.ispartofApplied Sciences
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectfatigue crack growth
dc.subjectlaser welding
dc.subjecthigh-strength low-alloy steel
dc.subjectfatigue life
dc.titleInfluence of Local Properties on Fatigue Crack Growth of Laser Butt Welds in Thin Plates of High-Strength Low-Alloy Steeleng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCentre for Mechanical Enginnering, Materials and Processes
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00285%2F2020/PT
oaire.citation.endPage17
oaire.citation.issue16
oaire.citation.startPage1
oaire.citation.titleApplied Sciences (Switzerland)
oaire.citation.volume11
oaire.fundingStream6817 - DCRRNI ID
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
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
relation.isAuthorOfPublication9b079aa3-b79b-4395-b081-1f23d6a17514
relation.isAuthorOfPublication.latestForDiscovery9b079aa3-b79b-4395-b081-1f23d6a17514
relation.isProjectOfPublication0a3418ca-35b9-4670-a826-154cceca5a89
relation.isProjectOfPublication.latestForDiscovery0a3418ca-35b9-4670-a826-154cceca5a89

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In this work, local properties such as hardness and fatigue crack grow rate in the heat‐affected zone of four laser‐welded butt joints in thin high‐strength low‐alloy steel were ex-amined, so as to explain and predict fatigue lives at high stress levels through the fracture mechanics approach. The different welded series presented a similar fatigue crack growth rate in the heat‐affected and fusion zones, but lower than base metal due to the higher hardness of the bainitic–martensitic microstructure verified in the welded series. The results showed that at high stress levels in the as‐welded condition, the fatigue initiation stage can be neglected and assume some types of cracks, with an initial crack of 0.07 mm and appropriate fatigue crack growth rates, estimates of fatigue life close to the experimental results were obtained.
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