High impact toughness of CrCoNi medium-entropy alloy at liquid-helium temperature
文献类型：期刊论文
| 作者 | 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)
|
| 刊名 | SCRIPTA MATERIALIA
 |
| 出版日期 | 2019-11-01 |
| 卷号 | 172页码:66-71 |
| 关键词 | Impact fracture toughness Twinning Ductility High-entropy alloy Strain hardening |
| ISSN号 | 1359-6462 |
| DOI | 10.1016/j.scriptamat.2019.07.010 |
| 通讯作者 | Ma, Evan(ema@jhu.edu) ; Wu, Xiaolei(xlwu@imech.ac.cn) |
| 英文摘要 | 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. |
| 分类号 | 一类 |
| WOS关键词 | MECHANICAL-PROPERTIES ; FRACTURE-TOUGHNESS ; SHEAR BANDS ; DEFORMATION ; DEPENDENCE ; STRENGTH ; STEEL ; PROPAGATION ; BOUNDARIES ; DUCTILITY |
| 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] |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000482510700014 |
| 资助机构 | 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 |
| 其他责任者 | Ma, Evan ; Wu, Xiaolei |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/80024]  |
| 专题 | 力学研究所_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. |
入库方式： OAI收割
来源：力学研究所
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