Microstructural Characterization of Laser Weld of Hot-Stamped Al-Si Coated 22MnB5 and Modification of Weld Properties by Hybrid Welding

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dc.contributor.authorŠebestová, Hanacs
dc.contributor.authorHorník, Petrcs
dc.contributor.authorMikmeková, Šárkacs
dc.contributor.authorMrňa, Liborcs
dc.contributor.authorDoležal, Pavelcs
dc.contributor.authorNovotný, Jancs
dc.coverage.issue14cs
dc.coverage.volume14cs
dc.date.accessioned2022-03-29T10:54:05Z
dc.date.available2022-03-29T10:54:05Z
dc.date.issued2021-07-14cs
dc.description.abstractThe presence of Al-Si coating on 22MnB5 leads to the formation of large ferritic bands in the dominantly martensitic microstructure of butt laser welds. Rapid cooling of laser weld metal is responsible for insufficient diffusion of coating elements into the steel and incomplete homogenization of weld fusion zone. The Al-rich regions promote the formation of ferritic solid solution. Soft ferritic bands cause weld joint weakening. Laser welds reached only 64% of base metal's ultimate tensile strength, and they always fractured in the fusion zone during the tensile tests. We implemented hybrid laser-TIG welding technology to reduce weld cooling rate by the addition of heat of the arc. The effect of arc current on weld microstructure and mechanical properties was investigated. Thanks to the slower cooling, the large ferritic bands were eliminated. The hybrid welds reached greater ultimate tensile strength compared to laser welds. The location of the fracture moved from the fusion zone to a tempered heat-affected zone characterized by a drop in microhardness. The minimum of microhardness was independent of heat input in this region.en
dc.formattextcs
dc.format.extent1-15cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationMaterials . 2021, vol. 14, issue 14, p. 1-15.en
dc.identifier.doi10.3390/ma14143943cs
dc.identifier.issn1996-1944cs
dc.identifier.other177302cs
dc.identifier.urihttp://hdl.handle.net/11012/204054
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofMaterialscs
dc.relation.urihttps://doi.org/10.3390/ma14143943cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1996-1944/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subject22MnB5en
dc.subjectlaser weldingen
dc.subjecthybrid weldingen
dc.subjectcooling rateen
dc.subjecttensile strengthen
dc.subjectmicrostructureen
dc.subjectmicrohardnessen
dc.titleMicrostructural Characterization of Laser Weld of Hot-Stamped Al-Si Coated 22MnB5 and Modification of Weld Properties by Hybrid Weldingen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-177302en
sync.item.dbtypeVAVen
sync.item.insts2023.03.01 12:53:04en
sync.item.modts2023.03.01 12:14:38en
thesis.grantorVysoké učení technické v Brně. Fakulta chemická. Fakulta chemickács
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