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Tensile properties of S355 butt welds after exposure to high temperatures

2021-10-04Journal article Restricted access
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dc.contributor.authorRodrigues, D. M.
dc.contributor.authorLeitao, Carlos
dc.contributor.authorBalakrishnan, M.
dc.contributor.authorCraveiro, Hélder D.
dc.contributor.authorSantiago, A.
dc.date.accessioned2021-09-22T14:26:10Z
dc.date.available2021-09-22T14:26:10Z
dc.date.issued2021-10-04
dc.description.abstractThe influence of the exposure to high temperatures on the tensile properties and failure mode of butt-welded connections in 5355 J2 steel was assessed. With this aim, welds were produced using GMAW and FCAW semiautomatic processes. Transverse tensile specimens were extracted from the welded coupons, heated to high temperatures (300, 600 and 900 degrees C), cooled to room temperature and then loaded to failure. Microstructural characterization and hardness measurements were performed to explain the tensile behaviour of the specimens after exposure to high temperatures. Tests at ambient temperature were also conducted for benchmark comparison. From the analyses, it was possible to conclude that, in the absence of welding defects, the residual properties of the 5355 joints, after heat exposure, are very similar to that of the base material. However, the presence of welding defects, depending on its severity and typology, may conduct to rupture in the welds and low residual strength, after heat exposure. This happens even if those defects not affect the tensile properties of the connections in the as-welded condition. The residual capacity of steel structures will be only severely reduced after heat exposure to temperatures in the eutectoid range, i.e., between 700 and 900 degrees C. The critical exposure temperature may vary according to the chemical composition of the steels/welds and to the duration of the heat exposure. The strength loss and the ductility of the BM and of the connections are dependent of the duration of the heat exposure. Very long exposure conditions conduct to a maximum decrease in residual yield and ultimate strength of 30 % and 20%, respectively, in S355 J2 steels and welds.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationRODRIGUES, D. M.; [et al] – Tensile properties of S355 butt welds after exposure to high temperatures. Construction and Building Materials. ISSN 0950-0618. Vol. 302 (2021), pp. 1-14pt_PT
dc.identifier.doi10.1016/j.conbuildmat.2021.124374pt_PT
dc.identifier.eissn1879-0526
dc.identifier.issn0950-0618
dc.identifier.urihttp://hdl.handle.net/10400.21/13784
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationPOCI-01-0145-FEDER-031858 – INNOCFSCONC - FCTpt_PT
dc.relationInstitute for Sustainability and Innovation in Structural Engineering
dc.relationCentre for Mechanical Enginnering, Materials and Processes
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0950061821021322?via%3Dihubpt_PT
dc.subjectPost-fire residual propertiespt_PT
dc.subjectMechanical propertiespt_PT
dc.subjectMicrostructural analysispt_PT
dc.subjectSteel weldspt_PT
dc.subjectExperimentspt_PT
dc.titleTensile properties of S355 butt welds after exposure to high temperaturespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleInstitute for Sustainability and Innovation in Structural Engineering
oaire.awardTitleCentre for Mechanical Enginnering, Materials and Processes
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04029%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00285%2F2020/PT
oaire.citation.endPage14pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleConstruction and Building Materialspt_PT
oaire.citation.volume302pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
person.familyNameLeitao
person.familyNameSilva Craveiro
person.givenNameCarlos
person.givenNameHélder David
person.identifier887124
person.identifier.ciencia-id9E17-DA8F-CC8A
person.identifier.ciencia-idC81A-F480-5925
person.identifier.orcid0000-0003-0181-7146
person.identifier.orcid0000-0001-8590-5885
person.identifier.ridF-1485-2010
person.identifier.scopus-author-id24331810700
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication2978a43c-70ce-4b54-b95f-240558bafa62
relation.isAuthorOfPublication.latestForDiscovery8c4ea166-8c3a-4b7a-a11d-de74a2677264
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