Refinement of Mg alloys crystal structure via Nb-based heterogeneous substrates for improved performances

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dc.contributor.authorBolzoni, Leandroen_NZ
dc.contributor.authorJoshi, U.en_NZ
dc.contributor.authorAlain, R.en_NZ
dc.contributor.authorGaretto, D.en_NZ
dc.contributor.authorBabu, N.H.en_NZ
dc.date.accessioned2018-04-03T21:58:05Z
dc.date.available2018-04-18en_NZ
dc.date.available2018-04-03T21:58:05Z
dc.date.issued2018en_NZ
dc.description.abstractLightness and high specific strength make magnesium alloys ideal materials for the transportation industry, especially the automotive sector that is struggling to cope with the everyday more stringent regulations on emission of carbon dioxide. Wrought magnesium alloys are difficult to deform because of the few active slip systems characteristic of their hexagonal close-packed lattice. Consequently, most of the commercially available magnesium alloys are alloys based on the Mg-Al binary system used in casting processes. The improvement of the mechanical properties of these alloys cannot be achieved by means of grain refinement using Zr due to the formation of Zr aluminides. In this study we propose a novel chemical composition that can refine all types of Mg alloys as proved in the Al-containing AM50 Mg alloy. We demonstrate that Nb-B inoculation of Mg alloys promotes the formation of heterogeneously nucleated primary α-Mg grains leading to the reduction of the grain size and this is obtained over a wide range of cooling rates. We also show that the grain refinement achieved leads to the improvement of the properties of high pressure die cast Mg automotive components and has the potential to enhance the mechanical properties of cast Mg alloys.en_NZ
dc.format.mimetypeapplication/pdf
dc.identifier.citationBolzoni, L., Joshi, U., Alain, R., Garetto, D., & Babu, N. H. (2018). Refinement of Mg alloys crystal structure via Nb-based heterogeneous substrates for improved performances. Materials Science and Engineering A, 723, 70–78. https://doi.org/10.1016/j.msea.2018.03.005en
dc.identifier.doi10.1016/j.msea.2018.03.005en_NZ
dc.identifier.issn0921-5093en_NZ
dc.identifier.urihttps://hdl.handle.net/10289/11761
dc.language.isoen
dc.publisherElsevier
dc.relation.isPartOfMaterials Science and Engineering Aen_NZ
dc.rights© 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/).
dc.titleRefinement of Mg alloys crystal structure via Nb-based heterogeneous substrates for improved performancesen_NZ
dc.typeJournal Article
pubs.begin-page70
pubs.elements-id220409
pubs.end-page78
pubs.organisational-group/Waikato
pubs.organisational-group/Waikato/2018 PBRF
pubs.organisational-group/Waikato/FSEN
pubs.organisational-group/Waikato/FSEN/2018 PBRF - FSEN
pubs.organisational-group/Waikato/FSEN/School of Engineering
pubs.organisational-group/Waikato/FSEN/School of Engineering/2018 PBRF - School of Engineering
pubs.publication-statusAccepteden_NZ
pubs.user.infoBolzoni, Leandro (leandro@waikato.ac.nz)
pubs.volume723en_NZ
uow.verification.statusunverified
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