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Article: Incipient plasticity during nano-scratch in Ni3Al

TitleIncipient plasticity during nano-scratch in Ni3Al
Authors
Issue Date2004
PublisherTaylor & Francis Ltd. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/14786435.asp
Citation
Philosophical Magazine, 2004, v. 84 n. 29, p. 3145-3157 How to Cite?
AbstractThe subsequent sliding behaviour of the initially elastic, submicron contacts between a diamond tip and bulk polycrystalline Ni 3Al was investigated by nanoscratch tests. Scratches are made under constant normal loads otherwise too low to trigger crystal plasticity in uniaxial nanoindentation experiments. Three types of behaviour are observed: (i) the entire scratch is purely elastic with a sliding coefficient of friction (μ) of about 0.086; (ii) a sudden strain burst in the normal direction, commonly known as pop-in, occurs at the onset of sliding and the subsequent sliding is plastic with μ, typically a few times larger than 0.086; and (iii) an intermediate case in which the scratch is initially elastic followed by a pop-in beyond which the sliding becomes plastic. The intermediate case occurs rather randomly. The μ, for elastic sliding is found to be load- or size-independent, but that for plastic sliding exhibits a strong size effect, i.e. it is small at small loads, but increases towards a steady value at larger loads.
Persistent Identifierhttp://hdl.handle.net/10722/157003
ISSN
2015 Impact Factor: 1.632
2015 SCImago Journal Rankings: 0.953
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWo, PCen_US
dc.contributor.authorNgan, AHWen_US
dc.date.accessioned2012-08-08T08:44:54Z-
dc.date.available2012-08-08T08:44:54Z-
dc.date.issued2004en_US
dc.identifier.citationPhilosophical Magazine, 2004, v. 84 n. 29, p. 3145-3157en_US
dc.identifier.issn1478-6435en_US
dc.identifier.urihttp://hdl.handle.net/10722/157003-
dc.description.abstractThe subsequent sliding behaviour of the initially elastic, submicron contacts between a diamond tip and bulk polycrystalline Ni 3Al was investigated by nanoscratch tests. Scratches are made under constant normal loads otherwise too low to trigger crystal plasticity in uniaxial nanoindentation experiments. Three types of behaviour are observed: (i) the entire scratch is purely elastic with a sliding coefficient of friction (μ) of about 0.086; (ii) a sudden strain burst in the normal direction, commonly known as pop-in, occurs at the onset of sliding and the subsequent sliding is plastic with μ, typically a few times larger than 0.086; and (iii) an intermediate case in which the scratch is initially elastic followed by a pop-in beyond which the sliding becomes plastic. The intermediate case occurs rather randomly. The μ, for elastic sliding is found to be load- or size-independent, but that for plastic sliding exhibits a strong size effect, i.e. it is small at small loads, but increases towards a steady value at larger loads.en_US
dc.languageengen_US
dc.publisherTaylor & Francis Ltd. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/14786435.aspen_US
dc.relation.ispartofPhilosophical Magazineen_US
dc.titleIncipient plasticity during nano-scratch in Ni3Alen_US
dc.typeArticleen_US
dc.identifier.emailNgan, AHW: hwngan@hkucc.hku.hken_US
dc.identifier.authorityNgan, AHW=rp00225en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1080/14786430410001720354en_US
dc.identifier.scopuseid_2-s2.0-6444231273en_US
dc.identifier.hkuros97474-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-6444231273&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume84en_US
dc.identifier.issue29en_US
dc.identifier.spage3145en_US
dc.identifier.epage3157en_US
dc.identifier.isiWOS:000224605700005-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridWo, PC=9433530200en_US
dc.identifier.scopusauthoridNgan, AHW=7006827202en_US

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