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Article: Critical dimension for the dislocation structure in deformed copper micropillars

TitleCritical dimension for the dislocation structure in deformed copper micropillars
Authors
Zhao, XXWu, JChiu, YLJones, IPGu, RNgan, AHW
KeywordsCopper
Micropillar
Dislocation cell
Fractal
Focussed ion beam (FIB)
Issue Date2019
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/scriptamat
Citation
Scripta Materialia, 2019, v. 163, p. 137-141 How to Cite?
DOI: http://dx.doi.org/10.1016/j.scriptamat.2019.01.020
AbstractAlthough the effect of specimen size on strength has been well documented for metal micro-samples significantly larger than ~1 μm, less is known about the deformation induced dislocation structure, especially just above the size at which dislocation starvation happens. Here, uniaxial compression tests were performed on cylindrical [011] oriented copper micropillars with diameters of 1 μm, 3 μm and 5 μm. Dislocation cells formed in a fractal geometry in the 3 μm and 5 μm pillars, while dislocations were not retained in the 1 μm pillars. The effects of strain and strain rate on cell formation were also investigated.
Persistent Identifierhttp://hdl.handle.net/10722/277103
ISSN
1359-6462
2021 Impact Factor: 6.302
2020 SCImago Journal Rankings: 2.027
ISI Accession Number ID
WOS:000458940000029

 

DC FieldValueLanguage
dc.contributor.authorZhao, XX-
dc.contributor.authorWu, J-
dc.contributor.authorChiu, YL-
dc.contributor.authorJones, IP-
dc.contributor.authorGu, R-
dc.contributor.authorNgan, AHW-
dc.date.accessioned2019-09-20T08:44:29Z-
dc.date.available2019-09-20T08:44:29Z-
dc.date.issued2019-
dc.identifier.citationScripta Materialia, 2019, v. 163, p. 137-141-
dc.identifier.issn1359-6462-
dc.identifier.urihttp://hdl.handle.net/10722/277103-
dc.description.abstractAlthough the effect of specimen size on strength has been well documented for metal micro-samples significantly larger than ~1 μm, less is known about the deformation induced dislocation structure, especially just above the size at which dislocation starvation happens. Here, uniaxial compression tests were performed on cylindrical [011] oriented copper micropillars with diameters of 1 μm, 3 μm and 5 μm. Dislocation cells formed in a fractal geometry in the 3 μm and 5 μm pillars, while dislocations were not retained in the 1 μm pillars. The effects of strain and strain rate on cell formation were also investigated.-
dc.languageeng-
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/scriptamat-
dc.relation.ispartofScripta Materialia-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectCopper-
dc.subjectMicropillar-
dc.subjectDislocation cell-
dc.subjectFractal-
dc.subjectFocussed ion beam (FIB)-
dc.titleCritical dimension for the dislocation structure in deformed copper micropillars-
dc.typeArticle-
dc.identifier.emailNgan, AHW: hwngan@hku.hk-
dc.identifier.authorityNgan, AHW=rp00225-
dc.description.naturepostprint-
dc.identifier.doi10.1016/j.scriptamat.2019.01.020-
dc.identifier.scopuseid_2-s2.0-85060249549-
dc.identifier.hkuros305437-
dc.identifier.volume163-
dc.identifier.spage137-
dc.identifier.epage141-
dc.identifier.isiWOS:000458940000029-
dc.publisher.placeUnited Kingdom-
dc.identifier.issnl1359-6462-

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