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Influence of softening mechanisms on base materials plastic behaviour and defects formation in friction stir lap welding

2020-12-13Journal article Open access
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dc.contributor.authorS, SREE
dc.contributor.authorGalvão, Ivan
dc.contributor.authorLeitao, Carlos
dc.contributor.authorRodrigues, Dulce
dc.date.accessioned2021-01-06T11:14:31Z
dc.date.available2021-01-06T11:14:31Z
dc.date.issued2020-12-13
dc.description.abstractThe AA6082-T6 and AA5754-H22 aluminium alloys were selected as the base materials to fabricate similar and dissimilar friction stir lap welds. Three lap configurations, AA6082/AA5754, AA5754/AA6082 and AA6082/AA6082, were produced using three pin profiles and tested to analyse the role of the plastic behaviours of the base materials on the welding conditions. The macrostructural characterisation was carried out to understand the material flow response and hook defect formation. The mechanical characterisation of the joints was done by microhardness and lap tensile shear testing. The finite element analysis and phase simulation were conducted to predict the phase dissolution temperatures and the softening kinetics. The welding torque and axial forces registered were analysed to quantify differences in the alloy’s flowability during welding. The analysis of the welding machine outputs enabled to conclude that higher axial forces were registered when the AA5754 alloy was placed at the top of the dissimilar lap joint, showing that the non-heat-treatable alloy has lower flowability than the heat-treatable alloy. These results were associated with the flow-softening of the AA6082 alloy in plastic deformation at high temperatures. The coupled experimental and numerical analysis revealed that the plastic behaviour of the base materials strongly influenced the material flow and, in this way, the hook defect formation and the shear tensile properties of the welds.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationSABARI, Sree; [et al] – Influence of softening mechanisms on base materials plastic behaviour and defects formation in friction stir lap welding. Journal of Manufacturing and Materials Processing. ISSN 2504-4494. Vol. 4, N.º 4 (2020), pp. 1-13pt_PT
dc.identifier.doi10.3390/jmmp4040120pt_PT
dc.identifier.issn2504-4494
dc.identifier.urihttp://hdl.handle.net/10400.21/12562
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationUIDB/00285/2020 - FCTpt_PT
dc.relationUIDB/04029/2020 - FCTpt_PT
dc.relationPOCI-01-0145-FEDER-007633 - FCTpt_PT
dc.relationPOCI-01-0145-FEDER-032089 - FCTpt_PT
dc.subjectFriction stir lap weldingpt_PT
dc.subjectAluminium alloyspt_PT
dc.subjectNumerical simulationpt_PT
dc.subjectPlastic propertiespt_PT
dc.titleInfluence of softening mechanisms on base materials plastic behaviour and defects formation in friction stir lap weldingpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage13pt_PT
oaire.citation.issue4pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleJournal of Manufacturing and Materials Processingpt_PT
oaire.citation.volume4pt_PT
person.familyNameSHUNMUGAM
person.familyNameGalvão
person.familyNameLeitao
person.familyNameRodrigues
person.givenNameSREE SABARI
person.givenNameIvan
person.givenNameCarlos
person.givenNameDulce
person.identifier887124
person.identifier.ciencia-id5711-3A04-73CA
person.identifier.ciencia-id581F-44DA-F99D
person.identifier.ciencia-id9E17-DA8F-CC8A
person.identifier.ciencia-id4818-1AA4-940A
person.identifier.orcid0000-0003-3567-8228
person.identifier.orcid0000-0002-2580-7148
person.identifier.orcid0000-0003-0181-7146
person.identifier.orcid0000-0002-4494-5458
person.identifier.ridF-1485-2010
person.identifier.ridG-3823-2018
person.identifier.scopus-author-id57190024964
person.identifier.scopus-author-id36650802900
person.identifier.scopus-author-id24331810700
person.identifier.scopus-author-id7102104985
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication77ad7655-2d94-49a7-ad9c-d15ba261a88f
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relation.isAuthorOfPublication8e84b586-427a-41a9-9cbd-ca765754da87
relation.isAuthorOfPublication.latestForDiscovery8e84b586-427a-41a9-9cbd-ca765754da87

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