A Parametric Study of the Vacuum Arc Remelting (VAR) Process: Effects of Arc Radius, Side-Arcing, and Gas Cooling

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dc.contributor.authorKarimi-Sibaki, Ebrahimcs
dc.contributor.authorKharicha, Abdellahcs
dc.contributor.authorWu, Menghuaics
dc.contributor.authorLudwig, Andreascs
dc.contributor.authorBoháček, Jancs
dc.coverage.issue1cs
dc.coverage.volume51cs
dc.date.issued2020-02-01cs
dc.description.abstractMain modeling challenges for vacuum arc remelting (VAR) are briefly highlighted concerning various involving phenomena during the process such as formation and movement of cathode spots on the surface of electrode, the vacuum plasma, side-arcing, the thermal radiation in the vacuum region, magnetohydrodynamics (MHD) in the molten pool, melting of the electrode, and solidification of the ingot. A numerical model is proposed to investigate the influence of several decisive parameters such as arc mode (diffusive or constricted), amount of side-arcing, and gas cooling of shrinkage gap at mold-ingot interface on the solidification behavior of a Titanium-based (Ti-6Al-4V) VAR ingot. The electromagnetic and thermal fields are solved in the entire system including the electrode, vacuum plasma, ingot, and mold. The flow field in the molten pool and the solidification pool profile are computed. The depth of molten pool decreases as the radius of arc increases. With the decreasing amount of side-arcing, the depth of the molten pool increases. Furthermore, gas cooling fairly improves the internal quality of ingot (shallow pool depth) without affecting hydrodynamics in the molten pool. Modeling results are validated against an experiment.en
dc.formattextcs
dc.format.extent222-235cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationMETALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE. 2020, vol. 51, issue 1, p. 222-235.en
dc.identifier.doi10.1007/s11663-019-01719-5cs
dc.identifier.issn1073-5615cs
dc.identifier.orcid0000-0003-3319-4254cs
dc.identifier.other164737cs
dc.identifier.researcheridC-2078-2018cs
dc.identifier.scopus55213548700cs
dc.identifier.urihttp://hdl.handle.net/11012/194825
dc.language.isoencs
dc.publisherSpringer Naturecs
dc.relation.ispartofMETALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCEcs
dc.relation.urihttps://link.springer.com/article/10.1007/s11663-019-01719-5cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1073-5615/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectnumerical-simulationen
dc.subjectelectrode-gapen
dc.subjectco pressureen
dc.subjectthermophysical propertiesen
dc.subjecttemperature distributionen
dc.subjectmetal transferen
dc.subjectmelt rateen
dc.subjectbehavioren
dc.subjectsolidificationen
dc.subjectalloyen
dc.titleA Parametric Study of the Vacuum Arc Remelting (VAR) Process: Effects of Arc Radius, Side-Arcing, and Gas Coolingen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-164737en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:47:22en
sync.item.modts2025.01.17 16:44:35en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Laboratoř přenosu tepla a prouděnícs
thesis.grantorVysoké učení technické v Brně. . Montanuniversität Leobencs
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