Heterogeneous Nb-Based Nuclei for the Grain Refinement of Al-Si Alloys

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dc.contributor.authorBolzoni, Leandroen_NZ
dc.contributor.authorHari Babu, Nadendlaen_NZ
dc.date.accessioned2016-04-15T01:22:50Z
dc.date.available2016en_NZ
dc.date.available2016-04-15T01:22:50Z
dc.date.issued2016en_NZ
dc.description.abstractNb-based intermetallics are, generally, low-density high-temperature materials used for structural applications or cryogenic superconductors. In this work, we report the development of an Al(96)-Nb(2)-B(2) master alloy where in situ-formed micrometric Nb-based intermetallics (i.e. NbB2 and Al3Nb) are used for a completely different purpose: to promote the refinement of Al-Si alloys by taking advantage of enhanced heterogeneous nucleation. Nb-based intermetallics have the right characteristics, like low density, stability at high temperature and good lattice match, to be used as heterogeneous nucleation substrates. It was found that the addition of these Nb-based intermetallics permits the significant refinement of the microstructural features of the Al-Si alloy studied. The enhanced heterogeneous nucleation makes the grain size of the material far less dependent on the cooling rate, which is one of the critical parameters influencing the variation of the properties of the alloy.en_NZ
dc.format.mimetypeapplication/pdf
dc.identifier.citationBolzoni, L., & Hari Babu, N. (2016). Heterogeneous Nb-Based Nuclei for the Grain Refinement of Al-Si Alloys. JOM, 68(5), 1301–1306. http://doi.org/10.1007/s11837-016-1855-8en
dc.identifier.doi10.1007/s11837-016-1855-8en_NZ
dc.identifier.eissn1543-1851en_NZ
dc.identifier.issn1047-4838en_NZ
dc.identifier.urihttps://hdl.handle.net/10289/10092
dc.language.isoen
dc.publisherSpringeren_NZ
dc.relation.isPartOfJOMen_NZ
dc.rights© The Author(s) 2016. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://​creativecommons.​org/​licenses/​by/​4.​0/​), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
dc.titleHeterogeneous Nb-Based Nuclei for the Grain Refinement of Al-Si Alloysen_NZ
dc.typeJournal Article
pubs.begin-page1301
pubs.elements-id138357
pubs.end-page1306
pubs.issue5en_NZ
pubs.organisational-group/Waikato
pubs.organisational-group/Waikato/FSEN
pubs.organisational-group/Waikato/FSEN/Engineering
pubs.volume68en_NZ
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