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dc.contributor.authorCao, Peng
dc.contributor.authorQian, Ma
dc.contributor.authorStJohn, David H.
dc.contributor.authorFrost, M.T.
dc.date.accessioned2008-04-18T01:54:07Z
dc.date.available2008-04-18T01:54:07Z
dc.date.issued2004-05
dc.identifier.citationCao, P., Qian, M., & Frost, M.T. (2004). Uptake of iron and its effect on grain refinement of pure magnesium by zirconium. Materials Science and Technology 20(1), 585-592.en_US
dc.identifier.issn02670836
dc.identifier.urihttps://hdl.handle.net/10289/771
dc.description.abstractThe uptake of iron by molten magnesium from uncoated new mild steel crucibles at temperatures 680°C, 730°C, and 780°C has been investigated. It was shown that the uptake of iron was sluggish at 680°C and the use of 0.05% zirconium addition could effectively suppress the increase in iron content within the first 2 h of holding at temperature. Rapid and severe uptake of iron was observed at 780°C. As a consequence, it was found that the grain refinement of pure magnesium achieved by 1% zirconium addition nearly vanished after 60 min hold at 780°C due to the depletion of soluble zirconium. The uptake of iron at 730°C was conspicuous but it was still controllable by use of 0.05% zirconium addition within the first 60 min of holding at temperature. The work conducted using an aluminium titanite crucible and a boron nitride coated mild steel crucible at 730°C further confirmed the highly detrimental influence of the uptake of iron on the grain refinement of pure magnesium by zirconium. The characteristic zirconium rich coring structures developed from circular to rosette like when the melt was held at 730°C in an uncoated mild steel crucible, while no such evolution was observed when held in an aluminium titanite crucible at the same temperature. Recommendations to minimise the consumption of zirconium by the uptake of iron were made based on the results obtained from this investigation. The mechanism of grain refinement of magnesium by a low concentration of zirconium is discussed.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherManey Publishingen_NZ
dc.relation.urihttp://www.ingentaconnect.com/content/maney/msten_US
dc.rightsThis article was first published in the journal, Materials Science and Technology.en_US
dc.subjectgrain refinementen_US
dc.subjectironen_US
dc.subjectmagnesiumen_US
dc.subjectzirconiumen_US
dc.titleUptake of iron and its effect on grain refinement of pure magnesium by zirconiumen_US
dc.typeJournal Articleen_US
dc.identifier.doi10.1179/026708304225012314en_US
dc.relation.isPartOfMaterials Science and Technologyen_NZ
pubs.begin-page585en_NZ
pubs.editionMayen_NZ
pubs.elements-id31351
pubs.end-page592en_NZ
pubs.issue5en_NZ
pubs.volume20en_NZ


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