Influence of grain size and composition, topology and excess free volume on the deformation behavior of Cu–Zr nanoglasses

dc.bibliographicCitation.firstPage537eng
dc.bibliographicCitation.issue1eng
dc.bibliographicCitation.journalTitleBeilstein Journal of Nanotechnologyeng
dc.bibliographicCitation.lastPage545eng
dc.bibliographicCitation.volume6
dc.contributor.authorŞopu, Daniel
dc.contributor.authorAlbe, Karsten
dc.date.accessioned2018-05-29T16:38:44Z
dc.date.available2019-06-28T07:31:06Z
dc.date.issued2015
dc.description.abstractThe influence of grain size and composition on the mechanical properties of Cu–Zr nanoglasses (NGs) is investigated by molecular dynamics simulations using two model glasses of different alloy composition, namely Cu64Zr36 (Cu-rich) and Cu36Zr64 (Zr-rich). When the grain size is increased, or the fraction of interfaces in these NGs is decreased, we find a transition from a homogeneous to an inhomogeneous plastic deformation, because the softer interfaces are promoting the formation shear transformation zones. In case of the Cu-rich system, shear localization at the interfaces is most pronounced, since both the topological order and free volume content of the interfaces are very different from the bulk phase. After thermal treatment the redistribution of free volume leads to a more homogenous deformation behavior. The deformation behavior of the softer Zr-rich nanoglass, in contrast, is only weakly affected by the presence of glass–glass interfaces, since the interfaces don’t show topological disorder. Our results provide clear evidence that the mechanical properties of metallic NGs can be systematically tuned by controlling the size and the chemical composition of the glassy nanograins.eng
dc.description.versionpublishedVersioneng
dc.formatapplication/pdf
dc.identifier.urihttps://doi.org/10.34657/4910
dc.identifier.urihttps://oa.tib.eu/renate/handle/123456789/1409
dc.language.isoengeng
dc.publisherFrankfurt, M. : Beilstein-Institut zur Förderung der Chemischen Wissenschafteneng
dc.relation.doihttps://doi.org/10.3762/bjnano.6.56
dc.rights.licenseCC BY 2.0 Unportedeng
dc.rights.urihttps://creativecommons.org/licenses/by/2.0/eng
dc.subject.ddc620eng
dc.subject.otherEnhanced plasticityeng
dc.subject.othermetallic glasseseng
dc.subject.othernanoglasseseng
dc.subject.othershear bandseng
dc.titleInfluence of grain size and composition, topology and excess free volume on the deformation behavior of Cu–Zr nanoglasseseng
dc.typeArticleeng
dc.typeTexteng
tib.accessRightsopenAccesseng
wgl.contributorIFWDeng
wgl.subjectIngenieurwissenschafteneng
wgl.typeZeitschriftenartikeleng
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