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Article: An explanation for the power-law scaling of size effect on strength in micro-specimens

TitleAn explanation for the power-law scaling of size effect on strength in micro-specimens
Authors
Ngan, AHW
KeywordsAluminum
Compression test
Dislocations
Plastic deformation
Issue Date2011
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/scriptamat
Citation
Scripta Materialia, 2011, v. 65 n. 11, p. 978-981 How to Cite?
DOI: http://dx.doi.org/10.1016/j.scriptamat.2011.08.027
AbstractThe power-law scaling of size effect of strength in micro-crystals is explained in terms of an assumed fractal geometry of the initial dislocation network. The size effect arises from the Taylor-type resistance in such a network. The power exponent of the size effect is predicted to be 3/(q + n), where q is the fractal dimension of the dislocation network, and n is the stress exponent of dislocation velocity. The theory is verified by a set of experimental strength data of Al micro-pillars. © 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/142377
ISSN
1359-6462
2023 Impact Factor: 5.3
2023 SCImago Journal Rankings: 1.738
ISI Accession Number ID
WOS:000296940500011
Funding AgencyGrant Number
Research Grants Council of the Hong Kong Special Administration Region, ChinaHKU7159/10E
Funding Information:

The experimental data in this work, published in Ref. [7], were obtained by K.S. Ng during his PhD studies at HKU. The work described in this paper was supported by a grant from the Research Grants Council of the Hong Kong Special Administration Region, China (Project No. HKU7159/10E).

References
References in Scopus

 

DC FieldValueLanguage
dc.contributor.authorNgan, AHWen_HK
dc.date.accessioned2011-10-28T02:44:31Z-
dc.date.available2011-10-28T02:44:31Z-
dc.date.issued2011en_HK
dc.identifier.citationScripta Materialia, 2011, v. 65 n. 11, p. 978-981en_HK
dc.identifier.issn1359-6462en_HK
dc.identifier.urihttp://hdl.handle.net/10722/142377-
dc.description.abstractThe power-law scaling of size effect of strength in micro-crystals is explained in terms of an assumed fractal geometry of the initial dislocation network. The size effect arises from the Taylor-type resistance in such a network. The power exponent of the size effect is predicted to be 3/(q + n), where q is the fractal dimension of the dislocation network, and n is the stress exponent of dislocation velocity. The theory is verified by a set of experimental strength data of Al micro-pillars. © 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/scriptamaten_HK
dc.relation.ispartofScripta Materialiaen_HK
dc.subjectAluminumen_HK
dc.subjectCompression testen_HK
dc.subjectDislocationsen_HK
dc.subjectPlastic deformationen_HK
dc.titleAn explanation for the power-law scaling of size effect on strength in micro-specimensen_HK
dc.typeArticleen_HK
dc.identifier.emailNgan, AHW:hwngan@hkucc.hku.hken_HK
dc.identifier.authorityNgan, AHW=rp00225en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.scriptamat.2011.08.027en_HK
dc.identifier.scopuseid_2-s2.0-80054010193en_HK
dc.identifier.hkuros197649en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80054010193&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume65en_HK
dc.identifier.issue11en_HK
dc.identifier.spage978en_HK
dc.identifier.epage981en_HK
dc.identifier.isiWOS:000296940500011-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridNgan, AHW=7006827202en_HK
dc.identifier.issnl1359-6462-

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