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Article: Stochastic nature of plasticity of aluminum micro-pillars

TitleStochastic nature of plasticity of aluminum micro-pillars
Authors
KeywordsCompression test
Dislocations
Monte Carlo techniques
Nanoindenation
Plastic deformation
Issue Date2008
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/actamat
Citation
Acta Materialia, 2008, v. 56 n. 8, p. 1712-1720 How to Cite?
AbstractMicron-sized aluminum pillars, fabricated by focused-ion beam milling, were subjected to compression in a nanoindenter using a flat-ended tip to examine their deformation behavior. The deformation was jerky and the statistical distributions of the sizes of the bursts, their occurrence frequency, as well as the stresses at which they occurred were analyzed. The burst size was found to increase with stress in an approximately exponential manner. Post-mortem transmission electron microscopy investigation of the dislocation structures revealed that the dislocation density of the micro-pillars did not grow significantly after severe deformation. Based on the experimental observations, a Monte Carlo model was developed to describe the stochastic nature of deformation of these micro-pillars. © 2007 Acta Materialia Inc.
Persistent Identifierhttp://hdl.handle.net/10722/76021
ISSN
2015 Impact Factor: 5.058
2015 SCImago Journal Rankings: 3.683
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorNg, KSen_HK
dc.contributor.authorNgan, AHWen_HK
dc.date.accessioned2010-09-06T07:16:51Z-
dc.date.available2010-09-06T07:16:51Z-
dc.date.issued2008en_HK
dc.identifier.citationActa Materialia, 2008, v. 56 n. 8, p. 1712-1720en_HK
dc.identifier.issn1359-6454en_HK
dc.identifier.urihttp://hdl.handle.net/10722/76021-
dc.description.abstractMicron-sized aluminum pillars, fabricated by focused-ion beam milling, were subjected to compression in a nanoindenter using a flat-ended tip to examine their deformation behavior. The deformation was jerky and the statistical distributions of the sizes of the bursts, their occurrence frequency, as well as the stresses at which they occurred were analyzed. The burst size was found to increase with stress in an approximately exponential manner. Post-mortem transmission electron microscopy investigation of the dislocation structures revealed that the dislocation density of the micro-pillars did not grow significantly after severe deformation. Based on the experimental observations, a Monte Carlo model was developed to describe the stochastic nature of deformation of these micro-pillars. © 2007 Acta Materialia Inc.en_HK
dc.languageengen_HK
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/actamaten_HK
dc.relation.ispartofActa Materialiaen_HK
dc.subjectCompression testen_HK
dc.subjectDislocationsen_HK
dc.subjectMonte Carlo techniquesen_HK
dc.subjectNanoindenationen_HK
dc.subjectPlastic deformationen_HK
dc.titleStochastic nature of plasticity of aluminum micro-pillarsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1359-6454&volume=56&spage=1712&epage=1720&date=2008&atitle=Stochastic+nature+of+plasticity+of+aluminum+micro-pillarsen_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.actamat.2007.12.016en_HK
dc.identifier.scopuseid_2-s2.0-41849114941en_HK
dc.identifier.hkuros142713en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-41849114941&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume56en_HK
dc.identifier.issue8en_HK
dc.identifier.spage1712en_HK
dc.identifier.epage1720en_HK
dc.identifier.eissn1873-2453-
dc.identifier.isiWOS:000255993800006-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridNg, KS=23005417800en_HK
dc.identifier.scopusauthoridNgan, AHW=7006827202en_HK
dc.identifier.citeulike4218361-

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