Deformation kinetics of Zr-based bulk metallic glasses Temperature and strain rate influences on shear banding
dc.contributor.author
Dalla Torre, Florian H.
dc.contributor.author
Dubach, Alban
dc.contributor.author
Löffler, Jörg F.
dc.date.accessioned
2025-07-09T11:39:26Z
dc.date.available
2017-06-08T23:56:07Z
dc.date.available
2025-07-09T11:39:26Z
dc.date.issued
2010-04-16
dc.identifier.issn
0925-8388
dc.identifier.issn
1873-4669
dc.identifier.other
10.1016/j.jallcom.2009.10.015
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/20574
dc.description.abstract
At low homologous temperatures metallic glasses exhibit inhomogeneous flow behaviour, which is associated with narrow shear banding. Based on the width of the shear bands and the time-dependent heat conduction, we show here that this process is not fully adiabatic at low strain rates, even though temperatures are sufficiently high to create a drop in viscosity within either a new or a pre-existing shear band. Evaluation of the deformation kinetics at cryogenic temperatures suggests an increase in viscosity within the shear band, although temperatures are still sufficiently high to cause localised melting at fracture. In addition, a change from serrated to non-serrated flow can be observed if the temperature is lowered below a critical value. This macroscopic change in the flow behaviour is directly related to a change in the strain rate sensitivity from negative to positive values, suggesting a clear change in deformation behaviour. We propose a refined shear dilatation model to explain the experimental findings.
en_US
dc.language.iso
en
en_US
dc.publisher
Elsevier
en_US
dc.subject
Bulk metallic glass
en_US
dc.subject
Deformation kinetics
en_US
dc.subject
Activation volume
en_US
dc.subject
Shear banding
en_US
dc.subject
Inhomogeneous flow
en_US
dc.title
Deformation kinetics of Zr-based bulk metallic glasses Temperature and strain rate influences on shear banding
en_US
dc.type
Journal Article
dc.date.published
2009-10-13
ethz.journal.title
Journal of Alloys and Compounds
ethz.journal.volume
495
en_US
ethz.journal.issue
2
en_US
ethz.journal.abbreviated
J. alloys compd.
ethz.pages.start
341
en_US
ethz.pages.end
344
en_US
ethz.identifier.wos
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02160 - Dep. Materialwissenschaft / Dep. of Materials::02645 - Institut für Metallforschung / Institute of Metals Research::03661 - Löffler, Jörg F. / Löffler, Jörg F.
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02160 - Dep. Materialwissenschaft / Dep. of Materials::02645 - Institut für Metallforschung / Institute of Metals Research::03661 - Löffler, Jörg F. / Löffler, Jörg F.
ethz.date.deposited
2017-06-08T23:56:11Z
ethz.source
ECIT
ethz.identifier.importid
imp59364cbaee52035233
ethz.ecitpid
pub:33077
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2017-07-14T19:10:33Z
ethz.rosetta.lastUpdated
2024-02-01T16:00:42Z
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true
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true
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