Variability of poisson's ratio and enhanced ductility in amorphous metal

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dc.contributor.authorLiss, KDen_AU
dc.contributor.authorQu, DDen_AU
dc.contributor.authorYan, Ken_AU
dc.contributor.authorReid, Men_AU
dc.date.accessioned2014-07-02T02:02:12Zen_AU
dc.date.available2014-07-02T02:02:12Zen_AU
dc.date.issued2013-05-01en_AU
dc.date.statistics2014-07-02en_AU
dc.description.abstractDuctile bulk metallic glass of composition 53.0Zr–18.7Cu–12.0Ni–16.3Al (at%) is plastically deformed under uniaxial compression and observed in situ by synchrotron high-energy X-ray diffraction. The diffraction patterns reveal the induced atomic strain is orientation dependent. At the onset of plastic deformation, the atomic strain in the compression direction saturates to a close-nearest-neighbor distance while atoms relax in the transverse direction. The ever increasing transverse atomic strain expresses in an augmentation of the apparent Poisson's ratio up to ν = 0.5, which is consistent with volume conservation. Contradicting phenomena from linear mechanics, such as the non-vanishing shear modulus at ν = 0.5 can be explained by the non-affine character of the deformation, giving rise to characteristics of a localized martensitic phase transformation. The findings explain the often-reported phenomena such as, the high Poisson's ratio values found in metallic glasses, the partially liquid character of the structure, the free volume increase and the Bauschinger effect. © 2013, Wiley-VCH Verlag GmbH & Co. KGaAen_AU
dc.identifier.citationLiss, K. -D., Qu, D. D., Yan, K., & Reid, M. (2013). Variability of poisson's ratio and enhanced ductility in mmorphous metal. Advanced Engineering Materials, 15(5), 347-351. doi:10.1002/adem.201200216en_AU
dc.identifier.govdoc5145en_AU
dc.identifier.issn1438-1656en_AU
dc.identifier.issue5en_AU
dc.identifier.journaltitleAdvanced Engineering Materialsen_AU
dc.identifier.pagination347-351en_AU
dc.identifier.urihttp://dx.doi.org/10.1002/adem.201200216en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/5727en_AU
dc.identifier.volume15en_AU
dc.language.isoenen_AU
dc.publisherWilye-V C H Verlag GMBHen_AU
dc.subjectGlassen_AU
dc.subjectAtomsen_AU
dc.subjectPhase transformationsen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectX-ray lasersen_AU
dc.subjectSynchrotronsen_AU
dc.titleVariability of poisson's ratio and enhanced ductility in amorphous metalen_AU
dc.typeJournal Articleen_AU
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