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dc.rights.licenseAttribution 4.0 International*
dc.contributor.authorMuñiz García, Laura
dc.contributor.authorTrinidad Naranjo, Javier
dc.contributor.authorGALDOS, Lander
dc.date.accessioned2024-03-26T13:43:54Z
dc.date.available2024-03-26T13:43:54Z
dc.date.issued2023
dc.identifier.issn2075-4701en
dc.identifier.otherhttps://katalogoa.mondragon.edu/janium-bin/janium_login_opac.pl?find&ficha_no=174226en
dc.identifier.urihttps://hdl.handle.net/20.500.11984/6321
dc.description.abstractThe quality and complexity demands of manufactured parts in sectors such as automotive and aeronautics lead to narrower process windows. This affects the repeatability and stability of the process, where material properties and process variations have a major impact. In bending processes, the bending angle is affected by variability in mechanical and microstructural properties, especially in high-strength materials. To address this, mechanical and microstructural characterization is crucial. This study conducted mechanical and microstructural characterization on five high-strength steels from different suppliers: three DP980 and two CP980. These materials are currently used by an industrial company in the automotive sector to manufacture a real product by means of U-bending, where a real issue of variability exists. Tensile tests were performed to quantify mechanical fluctuations. Microstructural analysis was also performed to determine the grain size and volume fractions of martensite and ferrite in the case of DP980, and ferrite, bainite, and retained austenite in the case of CP980. The largest variations were found for the hardening exponent, mean grain size, and elongation. To analyze their variability in an industrial process, U-bending tests were carried out using the five materials and the bending angle after the springback was measured. A total of 250 pieces were bent for the different materials and press strokes. Variations up to 1.25° in bending angle were found between the five batches for the same press stroke. A quantitative correlation analysis was performed to estimate the influence of the different parameters on the bending angle, where sheet thickness and tensile strength were shown to be two of the most influential parameters. Knowing this influence based on the variability of the properties, a control approach can be developed to reduce defects.en
dc.language.isoengen
dc.publisherMDPIen
dc.rights© 2023 The Authorsen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectVariabilityen
dc.subjectmechanical propertiesen
dc.subjectBendingen
dc.subjectmicrostructureen
dc.subjecthigh-strength steelen
dc.subjectdual phaseen
dc.subjectcomplex phaseen
dc.subjectDP980en
dc.subjectCP980en
dc.titleAnalysis of the mechanical and microstructural fluctuations of high-strength steels and their effect on bending angleen
dcterms.accessRightshttp://purl.org/coar/access_right/c_abf2en
dcterms.sourceMetalsen
local.contributor.groupProcesos avanzados de conformación de materialeses
local.description.peerreviewedtrueen
local.identifier.doihttps://doi.org/10.3390/met13091603en
local.source.detailsVol. 13. N. 9. N. art. 1603, 2023
oaire.format.mimetypeapplication/pdfen
oaire.file$DSPACE\assetstoreen
oaire.resourceTypehttp://purl.org/coar/resource_type/c_6501en
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85en
oaire.funderNameComisión Europeaen
oaire.funderIdentifierhttps://ror.org/00k4n6c32 / http://data.crossref.org/fundingdata/funder/10.13039/501100000780en
oaire.fundingStreamRFCS
oaire.awardNumberRFCS-2018-800730en
oaire.awardTitleDP1000 steel press bending holistic process chain improvement by novel control techniques and through thickness residual stress tailoring (FLATBEND)en
oaire.awardURISin información
dc.unesco.campohttp://skos.um.es/unesco6/33en
dc.unesco.disciplinahttp://skos.um.es/unesco6/3312en


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