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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
Title | Plastic dynamics of the Al0.5CoCrCuFeNi High Entropy Alloy at Cryogenic Temperatures: Jerky Flow, Stair-like Fluctuation, Scaling Behavior, and Non-chaotic State |
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Authors | |
Issue Date | 2017 |
Publisher | American 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? |
Abstract | This 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 Identifier | http://hdl.handle.net/10722/251435 |
ISSN | 2023 Impact Factor: 3.5 2023 SCImago Journal Rankings: 0.976 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Guo, X | - |
dc.contributor.author | Xie, X | - |
dc.contributor.author | Ren, J | - |
dc.contributor.author | Laktionova, M | - |
dc.contributor.author | Tabachnikova, E | - |
dc.contributor.author | Yu, L | - |
dc.contributor.author | Cheung, WS | - |
dc.contributor.author | Dahmen, KA | - |
dc.contributor.author | Liaw, PK | - |
dc.date.accessioned | 2018-03-01T03:39:15Z | - |
dc.date.available | 2018-03-01T03:39:15Z | - |
dc.date.issued | 2017 | - |
dc.identifier.citation | Applied Physics Letters, 2017, v. 111 n. 25, article no. 251905 | - |
dc.identifier.issn | 0003-6951 | - |
dc.identifier.uri | http://hdl.handle.net/10722/251435 | - |
dc.description.abstract | This 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.language | eng | - |
dc.publisher | American Institute of Physics. The Journal's web site is located at http://scitation.aip.org/content/aip/journal/apl | - |
dc.relation.ispartof | Applied Physics Letters | - |
dc.rights | This 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.title | Plastic dynamics of the Al0.5CoCrCuFeNi High Entropy Alloy at Cryogenic Temperatures: Jerky Flow, Stair-like Fluctuation, Scaling Behavior, and Non-chaotic State | - |
dc.type | Article | - |
dc.identifier.email | Cheung, WS: wscheung@hku.hk | - |
dc.identifier.authority | Cheung, WS=rp00678 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1063/1.5004241 | - |
dc.identifier.scopus | eid_2-s2.0-85040036505 | - |
dc.identifier.hkuros | 284304 | - |
dc.identifier.volume | 111 | - |
dc.identifier.issue | 25 | - |
dc.identifier.spage | article no. 251905 | - |
dc.identifier.epage | article no. 251905 | - |
dc.identifier.isi | WOS:000418648800018 | - |
dc.publisher.place | United States | - |
dc.identifier.issnl | 0003-6951 | - |