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Article: Mobility of screw dislocations in BCC crystals: A review on modelling methods

TitleMobility of screw dislocations in BCC crystals: A review on modelling methods
Authors
KeywordsBcc Metals
Dislocations
Mechanical Properties
Simulations
Issue Date2000
PublisherTaylor & Francis Ltd. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/10020071.asp
Citation
Progress In Natural Science, 2000, v. 10 n. 10, p. 728-729 How to Cite?
AbstractThis article reviews the methods employed in modelling the various aspects of mobility of screw dislocations in the body-centred cubic (BCC) structure. The behaviour of straight dislocation cores at 0 K has been well-understood following the application of traditional 2-D atomistic simulation in the past few decades. Kink-pair activation at non-zero temperatures has been classically treated by Volteira-type line tension models, but these have been superseded in recent years by a semi-continuum approach based on the Peierls-Nabarro framework. The use of 3-D atomistic simulation techniques in studying kink-pair related problems is also emerging. There is now the prospect that engineering-oriented phenomena such as brittle-to-ductile transition and the strain-rate sensitivity of deformation textures in BCC metals can be investigated at a more fundamental level involving dislocation core behaviour.
Persistent Identifierhttp://hdl.handle.net/10722/156765
ISSN
2015 Impact Factor: 1.753
2015 SCImago Journal Rankings: 0.575
References

 

DC FieldValueLanguage
dc.contributor.authorNgan, AHWen_US
dc.date.accessioned2012-08-08T08:43:52Z-
dc.date.available2012-08-08T08:43:52Z-
dc.date.issued2000en_US
dc.identifier.citationProgress In Natural Science, 2000, v. 10 n. 10, p. 728-729en_US
dc.identifier.issn1002-0071en_US
dc.identifier.urihttp://hdl.handle.net/10722/156765-
dc.description.abstractThis article reviews the methods employed in modelling the various aspects of mobility of screw dislocations in the body-centred cubic (BCC) structure. The behaviour of straight dislocation cores at 0 K has been well-understood following the application of traditional 2-D atomistic simulation in the past few decades. Kink-pair activation at non-zero temperatures has been classically treated by Volteira-type line tension models, but these have been superseded in recent years by a semi-continuum approach based on the Peierls-Nabarro framework. The use of 3-D atomistic simulation techniques in studying kink-pair related problems is also emerging. There is now the prospect that engineering-oriented phenomena such as brittle-to-ductile transition and the strain-rate sensitivity of deformation textures in BCC metals can be investigated at a more fundamental level involving dislocation core behaviour.en_US
dc.languageengen_US
dc.publisherTaylor & Francis Ltd. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/10020071.aspen_US
dc.relation.ispartofProgress in Natural Scienceen_US
dc.subjectBcc Metalsen_US
dc.subjectDislocationsen_US
dc.subjectMechanical Propertiesen_US
dc.subjectSimulationsen_US
dc.titleMobility of screw dislocations in BCC crystals: A review on modelling methodsen_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.scopuseid_2-s2.0-21244441968en_US
dc.identifier.hkuros58578-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-21244441968&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume10en_US
dc.identifier.issue10en_US
dc.identifier.spage728en_US
dc.identifier.epage729en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridNgan, AHW=7006827202en_US

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