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dc.contributor.authorLangelandsvik, Geir
dc.contributor.authorEriksson, Magnus
dc.contributor.authorAkselsen, Odd M.
dc.contributor.authorRoven, Hans Jørgen
dc.identifier.citationThe International Journal of Advanced Manufacturing Technology. 2021, 1-12.en_US
dc.description.abstractAluminium alloys processed by wire arc additive manufacturing (WAAM) exhibit a relatively coarse microstructure with a columnar morphology. A powerful measure to refine the microstructure and to enhance mechanical properties is to promote grain refinement during solidification. Addition of ceramic nanoparticles has shown great potential as grain refiner and strengthening phase in aluminium alloys. Thus, an Al-Mg alloy mixed with TiC nanoparticles was manufactured by the novel metal screw extrusion method to a wire and subsequently deposited by WAAM. Measures to restrict oxidation of magnesium during metal screw extrusion were examined. Purging of CO2 gas into the extrusion chamber resulted in a remarkable reduction in formation of MgO and Mg(OH)2. TiC decomposed to Al3Ti during WAAM deposition, leading to a significant grain refinement of 93% compared to a commercial benchmark. The presence of remaining TiC nanoparticles accounted for an increased hardness of the WAAM material through thermal expansion mismatch strengthening and Orowan strengthening. Exposure of TiC to moisture in air during metal screw extrusion increased the internal hydrogen content significantly, and a highly porous structure was seen after WAAM deposition.en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.subjectColumnar to equiaxed transition (CET)en_US
dc.subjectGrain refinementen_US
dc.subjectAluminium matrix composites (AMC)en_US
dc.subjectWire arc additive manufacturing (WAAM)en_US
dc.subjectAdditive manufacturingen_US
dc.subjectMetal continuous screw extrusion (MCSE)en_US
dc.titleWire arc additive manufacturing of AA5183 with TiC nanoparticlesen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.rights.holder© The Author(s) 2021en_US
dc.source.journalThe International Journal of Advanced Manufacturing Technologyen_US
dc.relation.projectNorges forskningsråd: 272402en_US

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Navngivelse 4.0 Internasjonal
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