Vis enkel innførsel

dc.contributor.authorCasari, Daniele
dc.contributor.authorMirihanage, Wajira
dc.contributor.authorFalch, Ken Vidar
dc.contributor.authorRingdalen, Inga Gudem
dc.contributor.authorFriis, Jesper
dc.contributor.authorSchmid-Fetzer, Rainer
dc.contributor.authorZhao, Dongdong
dc.contributor.authorLi, Yanjun
dc.contributor.authorSillekens, Wim H.
dc.contributor.authorMathiesen, Ragnvald
dc.date.accessioned2017-12-21T14:02:32Z
dc.date.available2017-12-21T14:02:32Z
dc.date.created2016-08-27T16:48:18Z
dc.date.issued2016
dc.identifier.citationActa Materialia. 2016, 116 177-187.nb_NO
dc.identifier.issn1359-6454
dc.identifier.urihttp://hdl.handle.net/11250/2473559
dc.description.abstractMicrostructure evolution in the commercial Mg-Nd-Gd-Zn-Zr alloy Elektron 21, solidified under nearly isothermal conditions, has been studied via in-situ X-ray radiography. For cooling rates View the MathML source≤0.075 K/s, primary equiaxed α-Mg dendrites undergo a morphological transition after nucleation and an initial stage of growth. The growth regime is observed to change abruptly from a 3D to a more pronounced anisotropic sheet-like growth occurring predominantly along View the MathML source direction, with a 4–5 times increase in the growth velocity. The experimental results together with thermodynamic calculations and density functional theory simulations give support to relate the morphology transition to the formation of ordered rare earth-zinc dimers in the {0001} basal plane and View the MathML source pyramidal plane of α-Mg lattice. At the temperature where the morphological transition occurs, it is found that both the solute concentration and zinc diffusivity in α-Mg are high enough for dimer formation to occur within a diffusive layer extending a few micrometres from the solid-liquid interface into α-Mg, and thereby open for increased solute-partitioning at the growth front.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.titleα-Mg primary phase formation and dendritic morphology transition in solidification of a Mg-Nd-Gd-Zn-Zr casting alloynb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.source.pagenumber177-187nb_NO
dc.source.volume116nb_NO
dc.source.journalActa Materialianb_NO
dc.identifier.doi10.1016/j.actamat.2016.06.035
dc.identifier.cristin1375961
dc.relation.projectNorges forskningsråd: 218404nb_NO
dc.description.localcodeThis article will not be available due to copyright restrictions (c) 2016 by Elseviernb_NO
cristin.unitcode194,66,20,0
cristin.unitcode194,66,35,0
cristin.unitnameInstitutt for fysikk
cristin.unitnameInstitutt for materialteknologi
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2


Tilhørende fil(er)

Thumbnail

Denne innførselen finnes i følgende samling(er)

Vis enkel innførsel