| High impact toughness of CrCoNi medium-entropy alloy at liquid-helium temperature | |
Yang MX(杨沐鑫) ; Zhou LL(周玲玲); Wang, C; Jiang P(姜萍); Yuan FP(袁福平); Ma, E; Wu XL(武晓雷)
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| Corresponding Author | Ma, Evan([email protected]) ; Wu, Xiaolei([email protected]) |
| Source Publication | SCRIPTA MATERIALIA
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| 2019-11-01 | |
| Volume | 172Pages:66-71 |
| ISSN | 1359-6462 |
| Abstract | We show that face-centered-cubic CrCoNi medium-entropy alloy sustains a Charpy V-notch impact toughness (A(K)) as high as 340 J at 4 K. Deformation twinning (DT) is rendered exceptionally profuse by this alloy's low stacking fault energy, combined with liquid-helium temperature and high strain rates that both incur high stresses to favor DT across a large plastic zone. This efficiently dissipates imposed mechanical energy, accumulates defects to sustain high strain hardening, and restrains strain localization events from evolving into major shear bands. Martensitic transformation to hexagonal phase is insignificant. CrCoNi is therefore a strong competitor to the best existing cryogenic alloys. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| Keyword | Impact fracture toughness Twinning Ductility High-entropy alloy Strain hardening |
| DOI | 10.1016/j.scriptamat.2019.07.010 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000482510700014 |
| WOS Keyword | MECHANICAL-PROPERTIES ; FRACTURE-TOUGHNESS ; SHEAR BANDS ; DEFORMATION ; DEPENDENCE ; STRENGTH ; STEEL ; PROPAGATION ; BOUNDARIES ; DUCTILITY |
| WOS Research Area | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| Funding Project | National Key Research and Development Program of China[2017YFA0204402] ; Natural Science Foundation of China[11572328] ; Natural Science Foundation of China[11672313] ; Natural Science Foundation of China[11790293] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040503] ; JHU by US[NSF-DMR1804320] |
| Funding Organization | National Key Research and Development Program of China ; Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; JHU by US |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Ma, Evan ; Wu, Xiaolei |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/80024 |
| Collection | 非线性力学国家重点实验室 |
| Recommended Citation GB/T 7714 | Yang MX,Zhou LL,Wang, C,et al. High impact toughness of CrCoNi medium-entropy alloy at liquid-helium temperature[J]. SCRIPTA MATERIALIA,2019,172:66-71.Rp_Au:Ma, Evan, Wu, Xiaolei |
| APA | 杨沐鑫.,周玲玲.,Wang, C.,姜萍.,袁福平.,...&武晓雷.(2019).High impact toughness of CrCoNi medium-entropy alloy at liquid-helium temperature.SCRIPTA MATERIALIA,172,66-71. |
| MLA | 杨沐鑫,et al."High impact toughness of CrCoNi medium-entropy alloy at liquid-helium temperature".SCRIPTA MATERIALIA 172(2019):66-71. |
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| File Name/Size | DocType | Version | Access | License | ||
| Jp2019326.pdf（875KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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