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dc.contributor.author
Karagadde, Shyamprasad
dc.contributor.author
Lee, P.D.
dc.contributor.author
Cai, B.
dc.contributor.author
Fife, Julie L.
dc.contributor.author
Azeem, M.A.
dc.contributor.author
Kareh, K.M.
dc.contributor.author
Puncreobutr, Chedtha
dc.contributor.author
Tsivoulas, Dimitrios
dc.contributor.author
Connolley, Thomas
dc.contributor.author
Atwood, Robert C.
dc.date.accessioned
2018-09-12T08:16:06Z
dc.date.available
2017-06-11T23:19:25Z
dc.date.available
2018-09-12T08:16:06Z
dc.date.issued
2015
dc.identifier.issn
2041-1723
dc.identifier.other
10.1038/ncomms9300
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/110835
dc.identifier.doi
10.3929/ethz-b-000110835
dc.description.abstract
Grain refinement via semi-solid deformation is desired to obtain superior mechanical properties of cast components. Using quantitative in situ synchrotron X-ray tomographic microscopy, we show an additional mechanism for the reduction of grain size, via liquation assisted transgranular cracking of semi-solid globular microstructures. Here we perform localized indentation of Al-15wt.%Cu globular microstructures, with an average grain size of ∼480 μm, at 555 °C (74% solid fraction). Although transgranular fracture has been observed in brittle materials, our results show transgranular fracture can also occur in metallic alloys in semi-solid state. This transgranular liquation cracking (TLC) occurs at very low contact stresses (between 1.1 and 38 MPa). With increasing strain, TLC continues to refine the size of the microstructure until the grain distribution reaches log-normal packing. The results demonstrate that this refinement, previously attributed to fragmentation of secondary arms by melt-shearing, is also controlled by an additional TLC mechanism.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Nature Publishing Group
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
Transgranular liquation cracking of grains in the semi-solid state
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2015-09-10
ethz.journal.title
Nature Communications
ethz.journal.volume
6
en_US
ethz.journal.abbreviated
Nat Commun
ethz.pages.start
8300
en_US
ethz.size
6 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.nebis
007044158
ethz.publication.place
London
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02140 - Dep. Inf.technologie und Elektrotechnik / Dep. of Inform.Technol. Electrical Eng.::02631 - Institut für Biomedizinische Technik / Institute for Biomedical Engineering::03817 - Stampanoni, Marco F.M. / Stampanoni, Marco F.M.
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02140 - Dep. Inf.technologie und Elektrotechnik / Dep. of Inform.Technol. Electrical Eng.::02631 - Institut für Biomedizinische Technik / Institute for Biomedical Engineering::03817 - Stampanoni, Marco F.M. / Stampanoni, Marco F.M.
ethz.date.deposited
2017-06-11T23:19:54Z
ethz.source
ECIT
ethz.identifier.importid
imp593653fb6342037232
ethz.ecitpid
pub:172110
ethz.eth
no
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-12T11:06:19Z
ethz.rosetta.lastUpdated
2020-02-15T14:58:54Z
ethz.rosetta.versionExported
true
ethz.COinS
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