High impact toughness of CrCoNi medium-entropy alloy at liquid-helium temperature

doi:10.1016/j.scriptamat.2019.07.010

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)
通讯作者	Ma, Evan(ema@jhu.edu) ; Wu, Xiaolei(xlwu@imech.ac.cn)
发表期刊	SCRIPTA MATERIALIA
	2019-11-01
卷号	172 页码:66-71
ISSN	1359-6462
摘要	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.
关键词	Impact fracture toughness Twinning Ductility High-entropy alloy Strain hardening
DOI	10.1016/j.scriptamat.2019.07.010
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000482510700014
关键词[WOS]	MECHANICAL-PROPERTIES ; FRACTURE-TOUGHNESS ; SHEAR BANDS ; DEFORMATION ; DEPENDENCE ; STRENGTH ; STEEL ; PROPAGATION ; BOUNDARIES ; DUCTILITY
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助项目	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]
项目资助者	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
论文分区	一类
力学所作者排名	1
RpAuthor	Ma, Evan ; Wu, Xiaolei
引用统计	被引频次：90[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/80024
专题	非线性力学国家重点实验室
推荐引用方式 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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