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Article: Relation between yield stress and Peierls stress

TitleRelation between yield stress and Peierls stress
Authors
Keywordsback stress
dislocation dynamics simulation
dislocations
Peierls stress
yield stress
Issue Date2019
PublisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.physica-status-solidi.com
Citation
Physica Status Solidi B: Basic Research, 2019, v. 256 n. 8, article no. 1900107 How to Cite?
AbstractIt is often assumed that the Peierls stress of single dislocations can reflect accurately the macroscopic yield stress. Here, dislocation dynamics simulations show that the yield stress‐to‐Peierls stress (Y/P) ratio remains within a small range of ≈0.3 ± 0.1, over a wide range of initial dislocation density, mobile dislocation fraction, and temperature which affects cross slip. This range of Y/P arises from the typical stress concentration ahead of dislocation pile‐ups. The results explain why Y/P was observed to be around one‐third in previous experiments.
Persistent Identifierhttp://hdl.handle.net/10722/277105
ISSN
2020 Impact Factor: 1.71
2020 SCImago Journal Rankings: 0.510
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorSiu, KW-
dc.contributor.authorNgan, AHW-
dc.date.accessioned2019-09-20T08:44:31Z-
dc.date.available2019-09-20T08:44:31Z-
dc.date.issued2019-
dc.identifier.citationPhysica Status Solidi B: Basic Research, 2019, v. 256 n. 8, article no. 1900107-
dc.identifier.issn0370-1972-
dc.identifier.urihttp://hdl.handle.net/10722/277105-
dc.description.abstractIt is often assumed that the Peierls stress of single dislocations can reflect accurately the macroscopic yield stress. Here, dislocation dynamics simulations show that the yield stress‐to‐Peierls stress (Y/P) ratio remains within a small range of ≈0.3 ± 0.1, over a wide range of initial dislocation density, mobile dislocation fraction, and temperature which affects cross slip. This range of Y/P arises from the typical stress concentration ahead of dislocation pile‐ups. The results explain why Y/P was observed to be around one‐third in previous experiments.-
dc.languageeng-
dc.publisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.physica-status-solidi.com-
dc.relation.ispartofPhysica Status Solidi B: Basic Research-
dc.rightsThis is the peer reviewed version of the following article: Physica Status Solidi B: Basic Research, 2019, v. 256 n. 8, article no. 1900107, which has been published in final form at https://doi.org/10.1002/pssb.201900107. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.-
dc.subjectback stress-
dc.subjectdislocation dynamics simulation-
dc.subjectdislocations-
dc.subjectPeierls stress-
dc.subjectyield stress-
dc.titleRelation between yield stress and Peierls stress-
dc.typeArticle-
dc.identifier.emailSiu, KW: kwkelvin@hku.hk-
dc.identifier.emailNgan, AHW: hwngan@hku.hk-
dc.identifier.authorityNgan, AHW=rp00225-
dc.description.naturepostprint-
dc.identifier.doi10.1002/pssb.201900107-
dc.identifier.scopuseid_2-s2.0-85064452055-
dc.identifier.hkuros305441-
dc.identifier.volume256-
dc.identifier.issue8-
dc.identifier.spagearticle no. 1900107-
dc.identifier.epagearticle no. 1900107-
dc.identifier.isiWOS:000479282900008-
dc.publisher.placeGermany-
dc.identifier.issnl0370-1972-

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