IMECH-IR  > 非线性力学国家重点实验室
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)
Corresponding AuthorMa, Evan(ema@jhu.edu) ; Wu, Xiaolei(xlwu@imech.ac.cn)
Source PublicationSCRIPTA MATERIALIA
2019-11-01
Volume172Pages:66-71
ISSN1359-6462
AbstractWe 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.
KeywordImpact fracture toughness Twinning Ductility High-entropy alloy Strain hardening
DOI10.1016/j.scriptamat.2019.07.010
Indexed BySCI ; EI
Language英语
WOS IDWOS:000482510700014
WOS KeywordMECHANICAL-PROPERTIES ; FRACTURE-TOUGHNESS ; SHEAR BANDS ; DEFORMATION ; DEPENDENCE ; STRENGTH ; STEEL ; PROPAGATION ; BOUNDARIES ; DUCTILITY
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding ProjectNational 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 OrganizationNational 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
Ranking1
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/80025
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.
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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