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Article: Molecular dynamics study on compressive yield strength in Ni3Al micro-pillars

TitleMolecular dynamics study on compressive yield strength in Ni3Al micro-pillars
Authors
Issue Date2006
PublisherTaylor & Francis Ltd. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/09500839.asp
Citation
Philosophical Magazine Letters, 2006, v. 86 n. 6, p. 355-365 How to Cite?
AbstractRecent nanoindentation experiments on bulk samples as well as compression tests on micro-pillars indicate that the micron-sized material volumes exhibit a first yield point that strongly depends on the sample size. In this work, molecular dynamics (MD) simulations are carried out to investigate the onset of yielding in Ni 3 Al nano-sized pillars. The MD results show that dislocation generation is from the free surfaces of the micro-pillars, when thermal vibration induces too large a local interatomic displacement. The statistical distributions of the near-surface thermal atomic displacements gathered from the MD simulations are used in conjunction with a survival probability model to predict the yield conditions of real-sized micro-pillars in real time scales. The predicted results agree fairly well with experimental results in the literature.
Persistent Identifierhttp://hdl.handle.net/10722/156840
ISSN
2015 Impact Factor: 0.918
2015 SCImago Journal Rankings: 0.770
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZuo, Len_US
dc.contributor.authorNgan, AHWen_US
dc.date.accessioned2012-08-08T08:44:11Z-
dc.date.available2012-08-08T08:44:11Z-
dc.date.issued2006en_US
dc.identifier.citationPhilosophical Magazine Letters, 2006, v. 86 n. 6, p. 355-365en_US
dc.identifier.issn0950-0839en_US
dc.identifier.urihttp://hdl.handle.net/10722/156840-
dc.description.abstractRecent nanoindentation experiments on bulk samples as well as compression tests on micro-pillars indicate that the micron-sized material volumes exhibit a first yield point that strongly depends on the sample size. In this work, molecular dynamics (MD) simulations are carried out to investigate the onset of yielding in Ni 3 Al nano-sized pillars. The MD results show that dislocation generation is from the free surfaces of the micro-pillars, when thermal vibration induces too large a local interatomic displacement. The statistical distributions of the near-surface thermal atomic displacements gathered from the MD simulations are used in conjunction with a survival probability model to predict the yield conditions of real-sized micro-pillars in real time scales. The predicted results agree fairly well with experimental results in the literature.en_US
dc.languageengen_US
dc.publisherTaylor & Francis Ltd. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/09500839.aspen_US
dc.relation.ispartofPhilosophical Magazine Lettersen_US
dc.titleMolecular dynamics study on compressive yield strength in Ni3Al micro-pillarsen_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.doi10.1080/09500830600803890en_US
dc.identifier.scopuseid_2-s2.0-33746606013en_US
dc.identifier.hkuros117598-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33746606013&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume86en_US
dc.identifier.issue6en_US
dc.identifier.spage355en_US
dc.identifier.epage365en_US
dc.identifier.isiWOS:000239166500002-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridZuo, L=36863503700en_US
dc.identifier.scopusauthoridNgan, AHW=7006827202en_US
dc.identifier.citeulike774762-

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