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Imperfections and Modelling of the Weld Bead Profile of Laser Butt Joints in HSLA Steel Thin Plate

2021-01-14Artigo científico Acesso aberto
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datacite.subject.fosCiências Naturais::Outras Ciências Naturais
datacite.subject.sdg07:Energias Renováveis e Acessíveis
datacite.subject.sdg11:Cidades e Comunidades Sustentáveis
dc.contributor.authorRiofrío, Patricio G.
dc.contributor.authorFerreira, José A. M.
dc.contributor.authorCapela, Carlos A.
dc.date.accessioned2026-05-21T12:05:52Z
dc.date.available2026-05-21T12:05:52Z
dc.date.issued2021-01-14
dc.description.abstractIn many applications that use high strength steels, structural integrity depends greatly on weld quality. Imperfections and the weld bead geometry are influencing factors on mechanical properties of the welded joints but, especially in the fatigue strength, they cause a great decrease. The proper knowledge of these two factors is important from the nominal stress approach to the fracture mechanics approaches. Studies concerning the profile and imperfections of the weld bead in laser welding for thin plates of high strength steels are scarce. In this work, these two aspects are covered for five series single and double-welded joints, butt joints in a 3 mm thick HSLA steel, welded in a small range of welding parameters. The actual profiles captured with profilometer were modeled with proposed geometric parameters achieving an adequate fit with values of the coefficient of determination ℜ2 greater than 0.9000. Description of imperfections includes the distributions of porosity and undercuts. The evaluation of the weld quality, taking as guide the ISO 13919-1 standard determined B and D levels for the welded series while based on the stress-concentrating effect, showed a greater detriment in those series with undercuts and excessive penetration. The analysis of variance validated the results of the different combinations of laser welding parameters and showed, for the factorial experimental design, a more significant effect of the welding speed.eng
dc.description.sponsorshipFunding: This research is sponsored by FEDER funds through the program COMPETE-Programa Operacional Factores de Competitividade and by National funds through FCT-Fundaçao para a Ciência e Tecnologia, under the project UIDB/00285/2020. Acknowledgments: The authors acknowledge the support provided by the Universidad de las Fuerzas Armadas-ESPE with the PhD scholarship and by Mário Da Costa Martins and Fernando Meireles of the Orthopedia Medica company where laser welding was done.
dc.identifier.citationRiofrío, P.G.; Ferreira, J.A.M.; Capela, C.A. Imperfections and Modelling of the Weld Bead Profile of Laser Butt Joints in HSLA Steel Thin Plate. Metals 2021, 11, 151. https://doi.org/10.3390/met11010151.
dc.identifier.doi10.3390/met11010151
dc.identifier.eissn2075-4701
dc.identifier.urihttp://hdl.handle.net/10400.8/16324
dc.language.isoeng
dc.peerreviewedyes
dc.publisherMDPI
dc.relationCentre for Mechanical Enginnering, Materials and Processes
dc.relation.hasversionhttps://www.mdpi.com/2075-4701/11/1/151
dc.relation.ispartofMetals
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectwelding imperfections
dc.subjectmodelling profile
dc.subjectlaser butt joints
dc.subjectthin HSLA steel
dc.subjectheat input
dc.titleImperfections and Modelling of the Weld Bead Profile of Laser Butt Joints in HSLA Steel Thin Plateeng
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberUIDB/00285/2020
oaire.awardTitleCentre for Mechanical Enginnering, Materials and Processes
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00285%2F2020/PT
oaire.citation.endPage19
oaire.citation.issue1
oaire.citation.startPage1
oaire.citation.titleMetals
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
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In many applications that use high strength steels, structural integrity depends greatly on weld quality. Imperfections and the weld bead geometry are influencing factors on mechanical properties of the welded joints but, especially in the fatigue strength, they cause a great decrease. The proper knowledge of these two factors is important from the nominal stress approach to the fracture mechanics approaches. Studies concerning the profile and imperfections of the weld bead in laser welding for thin plates of high strength steels are scarce. In this work, these two aspects are covered for five series single and double-welded joints, butt joints in a 3 mm thick HSLA steel, welded in a small range of welding parameters. The actual profiles captured with profilometer were modeled with proposed geometric parameters achieving an adequate fit with values of the coefficient of determination ℜ2 greater than 0.9000. Description of imperfections includes the distributions of porosity and undercuts. The evaluation of the weld quality, taking as guide the ISO 13919-1 standard determined B and D levels for the welded series while based on the stress-concentrating effect, showed a greater detriment in those series with undercuts and excessive penetration. The analysis of variance validated the results of the different combinations of laser welding parameters and showed, for the factorial experimental design, a more significant effect of the welding speed.
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