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Article: A universal relation for the stress dependence of activation energy for slip in body-centered cubic crystals
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TitleA universal relation for the stress dependence of activation energy for slip in body-centered cubic crystals
 
AuthorsNgan, AHW1
Zhang, HF1 2
 
KeywordsPhysics engineering
 
Issue Date1999
 
PublisherAmerican Institute of Physics. The Journal's web site is located at http://jap.aip.org/jap/staff.jsp
 
CitationJournal Of Applied Physics, 1999, v. 86 n. 3, p. 1236-1244 [How to Cite?]
DOI: http://dx.doi.org/10.1063/1.370877
 
AbstractBy analyzing experimental data in the literature, the activation energy H for slip in body-centered cubic metals is found to approximately obey the simple relation H≈0.1 μb3(1 - t)2, where t is the applied stress normalized by the zero-temperature Peierls stress, μ is the 〈111〉 shear modulus, and b the 1/2〈111〉 Burgers vector. Such universal relation is explained by analyzing the activation processes of kink-pair generation and expansion along threefold screw dislocations using the generalized Peierls-Nabarro model [A. H. W. Ngan, J. Mech. Phys. Solids 45, 903 (1997)]. The model also predicts qualitatively the general form of the orientation dependence of Peierls stress at zero temperature. © 1999 American Institute of Physics.
 
ISSN0021-8979
2012 Impact Factor: 2.21
2012 SCImago Journal Rankings: 0.990
 
DOIhttp://dx.doi.org/10.1063/1.370877
 
ISI Accession Number IDWOS:000081458800012
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorNgan, AHW
 
dc.contributor.authorZhang, HF
 
dc.date.accessioned2007-03-23T04:37:12Z
 
dc.date.available2007-03-23T04:37:12Z
 
dc.date.issued1999
 
dc.description.abstractBy analyzing experimental data in the literature, the activation energy H for slip in body-centered cubic metals is found to approximately obey the simple relation H≈0.1 μb3(1 - t)2, where t is the applied stress normalized by the zero-temperature Peierls stress, μ is the 〈111〉 shear modulus, and b the 1/2〈111〉 Burgers vector. Such universal relation is explained by analyzing the activation processes of kink-pair generation and expansion along threefold screw dislocations using the generalized Peierls-Nabarro model [A. H. W. Ngan, J. Mech. Phys. Solids 45, 903 (1997)]. The model also predicts qualitatively the general form of the orientation dependence of Peierls stress at zero temperature. © 1999 American Institute of Physics.
 
dc.description.naturepublished_or_final_version
 
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dc.format.extent40924 bytes
 
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dc.identifier.citationJournal Of Applied Physics, 1999, v. 86 n. 3, p. 1236-1244 [How to Cite?]
DOI: http://dx.doi.org/10.1063/1.370877
 
dc.identifier.doihttp://dx.doi.org/10.1063/1.370877
 
dc.identifier.epage1244
 
dc.identifier.hkuros48987
 
dc.identifier.isiWOS:000081458800012
 
dc.identifier.issn0021-8979
2012 Impact Factor: 2.21
2012 SCImago Journal Rankings: 0.990
 
dc.identifier.issue3
 
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dc.identifier.scopuseid_2-s2.0-0006205829
 
dc.identifier.spage1236
 
dc.identifier.urihttp://hdl.handle.net/10722/43028
 
dc.identifier.volume86
 
dc.languageeng
 
dc.publisherAmerican Institute of Physics. The Journal's web site is located at http://jap.aip.org/jap/staff.jsp
 
dc.publisher.placeUnited States
 
dc.relation.ispartofJournal of Applied Physics
 
dc.relation.referencesReferences in Scopus
 
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License
 
dc.subjectPhysics engineering
 
dc.titleA universal relation for the stress dependence of activation energy for slip in body-centered cubic crystals
 
dc.typeArticle
 
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Author Affiliations
  1. The University of Hong Kong
  2. China Iron and Steel Research Institute Group