中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 力学研究所
  3. 中国科学院力学研究所
  4. 非线性力学国家重点实验室
Stacking fault induced hardening and grain size effect in nanocrystalline CoNiCrFeMn high-entropy alloy

文献类型：期刊论文

作者Liu, Renguang2,3; Tang, Jing3; Jiang, Jiaxi1; Li, Xiaoyan1; Wei, Yujie2,3; Wei YJ(魏宇杰); Liu RG(刘人广); Tang J(唐婧); Wei YJ(魏宇杰); Liu RG(刘人广)
刊名EXTREME MECHANICS LETTERS
出版日期2022-10-01
卷号56页码:6
关键词High entropy alloys Stacking fault energy Strengthening Dislocations Hall-Petch
ISSN号2352-4316
DOI10.1016/j.eml.2022.101875
通讯作者Wei, Yujie(yujie_wei@lnm.imech.ac.cn)
英文摘要A broad variation of stacking fault energy (SFE) in high entropy alloys (HEAs) gives rise to rich deformation mechanisms and unique mechanical properties of HEAs. In this paper, we aim to reveal the interplay between grain boundaries and stacking faults in governing the strength and flow stress of CoNiCrFeMn HEA. We carried out atomistic simulations for the tension of polycrystalline CoNiCrFeMn HEA of different grain sizes from 3.0 to 48.6 nm at different temperatures. The tensile flow stress of the HEA follows the traditional Hall-Petch (HP) relation till grain size is down to 15.0 nm. Massive stacking faults contribute to the extra hardening and render a rather gradual drop of flow stress with increasing grain size: In the regime governed by HP relation, partial dislocations emitting from grain boundaries are primarily leading partials; and resulted stacking fault (SF) can serve as barriers to dislocation gliding on intersecting planes. This mild hardening mechanism complements strong hardening from grain boundaries. We expect SF induced hardening could be general in polycrystalline HEAs. The findings reported here may provide a basis and engineering guidance for strengthening and toughening the design of a broad range of HEAs characterized by a wide spectrum of SFEs.(c) 2022 The Author(s). Published by Elsevier Ltd.
WOS关键词HALL-PETCH RELATIONSHIP
资助项目National Natural Science Foundation of China (NSFC) Basic Science Center[11988102]
WOS研究方向Engineering ; Materials Science ; Mechanics
语种英语
WOS记录号WOS:000862816200007
资助机构National Natural Science Foundation of China (NSFC) Basic Science Center
源URL[http://dspace.imech.ac.cn/handle/311007/90361]  
专题力学研究所_非线性力学国家重点实验室
通讯作者Wei, Yujie; Wei YJ(魏宇杰)
作者单位1.Tsinghua Univ, Ctr Adv Mech & Mat, Dept Engn Mech, Appl Mech Lab, Beijing 100084, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Renguang,Tang, Jing,Jiang, Jiaxi,et al. Stacking fault induced hardening and grain size effect in nanocrystalline CoNiCrFeMn high-entropy alloy[J]. EXTREME MECHANICS LETTERS,2022,56:6.
APA Liu, Renguang.,Tang, Jing.,Jiang, Jiaxi.,Li, Xiaoyan.,Wei, Yujie.,...&Tang J.(2022).Stacking fault induced hardening and grain size effect in nanocrystalline CoNiCrFeMn high-entropy alloy.EXTREME MECHANICS LETTERS,56,6.
MLA Liu, Renguang,et al."Stacking fault induced hardening and grain size effect in nanocrystalline CoNiCrFeMn high-entropy alloy".EXTREME MECHANICS LETTERS 56(2022):6.

入库方式： OAI收割

来源：力学研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。