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

doi:10.1016/j.ijplas.2024.104132

IMECH-IR > 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
	Tan S(覃双)1 ; Zhang ZH(张子晗)2 ; Yu, Zheng 3; Zhang, Longhui 1; Yuan FP(袁福平)2 ; Yao, Xiaohu 1
通讯作者	Qin, Shuang([email protected]) ; Yao, Xiaohu([email protected])
发表期刊	INTERNATIONAL JOURNAL OF PLASTICITY
	2024-11-01
卷号	182 页码:17
ISSN	0749-6419
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.
关键词	High-entropy alloys Heterogeneous nanoprecipitates Work hardening Deformation mechanisms Cryogenic temperatures
DOI	10.1016/j.ijplas.2024.104132
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:001327867000001
关键词[WOS]	STACKING-FAULT ENERGY ; DEFORMATION ; BEHAVIOR ; NANOPARTICLES ; SUBSTRUCTURE ; DISLOCATION ; PRECIPITATE ; EVOLUTION ; STRENGTH ; PHASES
WOS研究方向	Engineering ; Materials Science ; Mechanics
WOS类目	Engineering, Mechanical ; Materials Science, Multidisciplinary ; Mechanics
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]
项目资助者	National Natural Science Foundation of China ; National Science Foundation for Distinguished Young Scholars of China ; Fundamental Research Funds for the Central Universities, China
论文分区	一类
力学所作者排名	1
RpAuthor	2
引用统计	被引频次：2[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/311007/96935
专题	非线性力学国家重点实验室
作者单位	1.South China Univ Technol, Dept Engn Mech, Guangzhou 510640, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 3.Univ Illinois, Dept Chem, Urbana, IL 61801 USA
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.Rp_Au:2
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.