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Article: Plastic dynamics of the Al0.5CoCrCuFeNi High Entropy Alloy at Cryogenic Temperatures: Jerky Flow, Stair-like Fluctuation, Scaling Behavior, and Non-chaotic State

TitlePlastic dynamics of the Al0.5CoCrCuFeNi High Entropy Alloy at Cryogenic Temperatures: Jerky Flow, Stair-like Fluctuation, Scaling Behavior, and Non-chaotic State
Authors
Issue Date2017
PublisherAmerican Institute of Physics. The Journal's web site is located at http://scitation.aip.org/content/aip/journal/apl
Citation
Applied Physics Letters, 2017, v. 111 n. 25, article no. 251905 How to Cite?
AbstractThis study investigates the plastic behavior of the Al0.5CoCrCuFeNi high-entropy alloy at cryogenic temperatures. The samples are uniaxially compressed at 4.2 K, 7.5 K, and 9 K. A jerky evolution of stress and stair-like fluctuation of strain are observed during plastic deformation. A scaling relationship is detected between the released elastic energy and strain-jump sizes. Furthermore, the dynamical evolution of serrations is characterized by the largest Lyapunov exponent. The largest Lyapunov exponents of the serrations at the three temperatures are all negative, which indicates that the dynamical regime is non-chaotic. This trend reflects an ordered slip process, and this ordered slip process exhibits a more disordered slip process, as the temperature decreases from 9 K to 4.2 K or 7.5 K.
Persistent Identifierhttp://hdl.handle.net/10722/251435
ISSN
2017 Impact Factor: 3.495
2015 SCImago Journal Rankings: 1.105
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorGuo, X-
dc.contributor.authorXie, X-
dc.contributor.authorRen, J-
dc.contributor.authorLaktionova, M-
dc.contributor.authorTabachnikova, E-
dc.contributor.authorYu, L-
dc.contributor.authorCheung, WS-
dc.contributor.authorDahmen, KA-
dc.contributor.authorLiaw, PK-
dc.date.accessioned2018-03-01T03:39:15Z-
dc.date.available2018-03-01T03:39:15Z-
dc.date.issued2017-
dc.identifier.citationApplied Physics Letters, 2017, v. 111 n. 25, article no. 251905-
dc.identifier.issn0003-6951-
dc.identifier.urihttp://hdl.handle.net/10722/251435-
dc.description.abstractThis study investigates the plastic behavior of the Al0.5CoCrCuFeNi high-entropy alloy at cryogenic temperatures. The samples are uniaxially compressed at 4.2 K, 7.5 K, and 9 K. A jerky evolution of stress and stair-like fluctuation of strain are observed during plastic deformation. A scaling relationship is detected between the released elastic energy and strain-jump sizes. Furthermore, the dynamical evolution of serrations is characterized by the largest Lyapunov exponent. The largest Lyapunov exponents of the serrations at the three temperatures are all negative, which indicates that the dynamical regime is non-chaotic. This trend reflects an ordered slip process, and this ordered slip process exhibits a more disordered slip process, as the temperature decreases from 9 K to 4.2 K or 7.5 K.-
dc.languageeng-
dc.publisherAmerican Institute of Physics. The Journal's web site is located at http://scitation.aip.org/content/aip/journal/apl-
dc.relation.ispartofApplied Physics Letters-
dc.rightsThis article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Applied Physics Letters, 2017, v. 111 n. 25, article no. 251905 and may be found at https://doi.org/10.1063/1.5004241-
dc.titlePlastic dynamics of the Al0.5CoCrCuFeNi High Entropy Alloy at Cryogenic Temperatures: Jerky Flow, Stair-like Fluctuation, Scaling Behavior, and Non-chaotic State-
dc.typeArticle-
dc.identifier.emailCheung, WS: wscheung@hku.hk-
dc.identifier.authorityCheung, WS=rp00678-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1063/1.5004241-
dc.identifier.scopuseid_2-s2.0-85040036505-
dc.identifier.hkuros284304-
dc.identifier.volume111-
dc.identifier.issue25-
dc.identifier.spagearticle no. 251905-
dc.identifier.epagearticle no. 251905-
dc.identifier.isiWOS:000418648800018-
dc.publisher.placeUnited States-

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