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
Tailoring multi-type nanoprecipitates in high-entropy alloys towards superior tensile properties at cryogenic temperatures

文献类型：期刊论文

作者Tan S(覃双)3; Zhang ZH(张子晗)2; Yu, Zheng1; Zhang, Longhui3; Yuan FP(袁福平)2; Yao, Xiaohu3
刊名INTERNATIONAL JOURNAL OF PLASTICITY
出版日期2024-11-01
卷号182页码:17
关键词High-entropy alloys Heterogeneous nanoprecipitates Work hardening Deformation mechanisms Cryogenic temperatures
ISSN号0749-6419
DOI10.1016/j.ijplas.2024.104132
通讯作者Qin, Shuang(qinshuang@scut.edu.cn) ; Yao, Xiaohu(yaoxh@scut.edu.cn)
英文摘要In this work, the quasi-static tensile properties in the face-centered cubic-based Al0.5Cr0.9FeNi2.5V0.2 HEAs containing two types of heterogeneous nanoprecipitates, i.e., dual-lamellar and spherical nanoprecipitates, at ambient (293 K) and liquid nitrogen (77 K) temperatures are thoroughly investigated. The microstructure formed by aging at 873 K comprises L12 and body-centered cubic dual-lamellar (DL) nanoprecipitates. In contrast, aging at 773 K results in solely spherical L12 nanoparticles. Both nanoprecipitates enhance mechanical strength as temperatures drop to 77 K; however, the DL nanoprecipitates additionally boost the work hardening rate, whereas the spherical nanoparticles notably improve ductility. To investigate the underlying deformation mechanisms, we perform interrupted mechanical tests and microstructure characterizations at various strains. The DL nanoprecipitates are observed to go through a multistage work hardening rate response by gradually introducing new boundaries to block dislocation motion, activating the stacking fault (SF) networks, and forming Lomer-Cottrell locks. A combination of interface hardening, dislocation hardening, SF-induced hardening, and precipitation hardening in DL samples leads to stronger hetero-deformation-induced hardening at cryogenic temperatures. In comparison, while samples with only spherical nanoparticles exhibit a monotonous decrease in the work-hardening rate, the spherical nanoparticles can be sheared by dislocations, effectively alleviating strain concentration and thereby enhancing ductility at cryogenic temperatures. Overall, this work provides practical design principles of nanoprecipitates for fine-tuning the balance of strength and ductility in FCC-based HEAs at cryogenic temperatures.
分类号一类
WOS关键词STACKING-FAULT ENERGY ; DEFORMATION ; BEHAVIOR ; NANOPARTICLES ; SUBSTRUCTURE ; DISLOCATION ; PRECIPITATE ; EVOLUTION ; STRENGTH ; PHASES
资助项目National Natural Science Foundation of China[12202459] ; National Natural Science Foundation of China[12232006] ; National Science Foundation for Distinguished Young Scholars of China[11925203] ; Fundamental Research Funds for the Central Universities, China[2024ZYGXZR056]
WOS研究方向Engineering ; Materials Science ; Mechanics
语种英语
WOS记录号WOS:001327867000001
资助机构National Natural Science Foundation of China ; National Science Foundation for Distinguished Young Scholars of China ; Fundamental Research Funds for the Central Universities, China
其他责任者2
源URL[http://dspace.imech.ac.cn/handle/311007/96934]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Univ Illinois, Dept Chem, Urbana, IL 61801 USA
2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China;
3.South China Univ Technol, Dept Engn Mech, Guangzhou 510640, Peoples R China;
推荐引用方式
GB/T 7714		 Tan S,Zhang ZH,Yu, Zheng,et al. Tailoring multi-type nanoprecipitates in high-entropy alloys towards superior tensile properties at cryogenic temperatures[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2024,182:17.
APA 覃双,张子晗,Yu, Zheng,Zhang, Longhui,袁福平,&Yao, Xiaohu.(2024).Tailoring multi-type nanoprecipitates in high-entropy alloys towards superior tensile properties at cryogenic temperatures.INTERNATIONAL JOURNAL OF PLASTICITY,182,17.
MLA 覃双,et al."Tailoring multi-type nanoprecipitates in high-entropy alloys towards superior tensile properties at cryogenic temperatures".INTERNATIONAL JOURNAL OF PLASTICITY 182(2024):17.

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。