The detrimental molten pool narrowing phenomenon in wire feed laser beam welding and its suppression by magnetohydrodynamic technique

dc.contributor.authorMeng, Xiangmeng
dc.contributor.authorArtinov, Antoni
dc.contributor.authorBachmann, Marcel
dc.contributor.authorÜstündağ, Ömer
dc.contributor.authorGumenyuk, Andrey
dc.contributor.authorRethmeier, Michael
dc.date.accessioned2022-06-22T11:23:59Z
dc.date.available2022-06-22T11:23:59Z
dc.date.issued2022-04-26
dc.description.abstractElement transport in the wire feed laser beam welding (WFLBW) is directly determined by the molten pool shape and thermo-fluid flow therein. In this paper, an untypical molten pool profile, i.e., elongated at its top and bottom but narrowed at the middle, is found experimentally by real-time metal/glass observation and numerically by multi-physical modeling. Ex-situ X-ray fluorescence element mapping is used to characterize the element dilution status in the fusion zone. For the first time, the detrimental influence of the molten pool narrowing on the element transport is identified and discussed, combining the experimental and numerical results. A magnetohydrodynamic technique is utilized to suppress the narrowing, aiming at a more homogenous element distribution. It is found that due to the interaction of the two dominant circulations from the top and bottom regions of the molten pool, a low-temperature region is formed. It leads to an untypical growth of the mushy zone, narrowing the molten pool in the middle region. Its detrimental effect on material mixing is non-negligible considering the direct blocking effect on the downward flow and the premature solidification at the middle region. The Lorentz force from a transverse oscillating magnetic field can change the flow pattern into a single-circulation type. The downward transfer channel is widened, and its premature solidification is prevented because the low-temperature-gradient region is mitigated. This paper provides a supplementary reason regarding the common issue of insufficient material mixing during LBW, and a promising technique to optimize the process.en
dc.description.sponsorshipDFG, 416014189, Simulation des Einflusses der elektromagnetisch unterstützten Durchmischung beim Laserstrahlschweißen dickwandiger Stahlbauteile mit Zusatzmaterialen
dc.description.sponsorshipDFG, 411393804, Experimentelle und numerische Untersuchung der Entstehungsmechanismen des Bulgings und dessen Einfluss auf die Bildung von Mittelrippendefekten beim Hochleistungslaserstrahlschweißen niedriglegierter Stähle hoher Blechdickeen
dc.identifier.eissn1879-2189
dc.identifier.issn0017-9310
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/17145
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-15924
dc.language.isoenen
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.ddc620 Ingenieurwissenschaften und zugeordnete Tätigkeitende
dc.subject.otherthermo-fluid flowen
dc.subject.otherelement transporten
dc.subject.otherlaser beam weldingen
dc.subject.othermagnetohydrodynamicsen
dc.subject.othermulti-physical modelingen
dc.titleThe detrimental molten pool narrowing phenomenon in wire feed laser beam welding and its suppression by magnetohydrodynamic techniqueen
dc.typeArticleen
dc.type.versionacceptedVersionen
dcterms.bibliographicCitation.articlenumber122913en
dcterms.bibliographicCitation.doi10.1016/j.ijheatmasstransfer.2022.122913en
dcterms.bibliographicCitation.journaltitleInternational Journal of Heat and Mass Transferen
dcterms.bibliographicCitation.originalpublishernameElsevieren
dcterms.bibliographicCitation.originalpublisherplaceAmsterdamen
dcterms.bibliographicCitation.volume193en
tub.accessrights.dnbembargoed*
tub.affiliationFak. 5 Verkehrs- und Maschinensysteme>Inst. Werkzeugmaschinen und Fabrikbetrieb>FG Fügetechnikde
tub.affiliation.facultyFak. 5 Verkehrs- und Maschinensystemede
tub.affiliation.groupFG Fügetechnikde
tub.affiliation.instituteInst. Werkzeugmaschinen und Fabrikbetriebde
tub.publisher.universityorinstitutionTechnische Universität Berlinen
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