Significantly improved strength and plasticity of a refractory high-entropy alloy at small length scale

doi:10.1016/j.msea.2023.144729

IMR OpenIR

	Significantly improved strength and plasticity of a refractory high-entropy alloy at small length scale
	Qu, Ruitao 1; Wu, Shaojie 2; Volkert, Cynthia A.3; Zhang, Zhefeng 2; Liu, Feng 1
通讯作者	Qu, Ruitao(rtqu@nwpu.edu.cn) ; Zhang, Zhefeng(zhfzhang@imr.ac.cn) ; Liu, Feng(liufeng@nwpu.edu.cn)
	2023-03-03
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	867 页码:8
摘要	Refractory high-entropy alloy (RHEA) VNbMoTaW exhibits remarkably high strength in a much wide temperature range, whereas the brittle fracture behavior limits the applications. Here we show a significant size effect on the strength, plasticity and fracture behaviour of the VNbMoTaW RHEA. As sample size goes from millimeter to sub-micrometer scale, the brittle cracking behavior of the RHEA is greatly suppressed, along with a simultaneous enhancement of strength and plasticity. The improved mechanical properties can be attributed to the disappearance of crack initiation sites, the size-dependent dislocation plasticity at small length scale and the sizedependent competition in thermodynamics driving-force for cleavage cracking and plastic yielding. The results imply a promising potential of the RHEA for making microscale devices with high temperature environment.
关键词	Refractory high-entropy alloy Size effect Strength Plasticity Fracture
资助者	National Natural Science Foundation of China (NSFC) ; Research Fund of the State Key Laboratory of Solidification Processing, NPU, China ; Start-up Program by Northwestern Polytechnical University
DOI	10.1016/j.msea.2023.144729
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China (NSFC)[2021-TS-10] ; Research Fund of the State Key Laboratory of Solidification Processing, NPU, China ; Start-up Program by Northwestern Polytechnical University ; [52271072]
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
WOS记录号	WOS:001054121400001
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/179054
专题	中国科学院金属研究所
通讯作者	Qu, Ruitao; Zhang, Zhefeng; Liu, Feng
作者单位	1.Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, 127 West Youyi Rd, Xian 710072, Shaanxi, Peoples R China 2.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China 3.Univ Gottingen, Inst Mat Phys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany
推荐引用方式 GB/T 7714	Qu, Ruitao,Wu, Shaojie,Volkert, Cynthia A.,et al. Significantly improved strength and plasticity of a refractory high-entropy alloy at small length scale[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2023,867:8.
APA	Qu, Ruitao,Wu, Shaojie,Volkert, Cynthia A.,Zhang, Zhefeng,&Liu, Feng.(2023).Significantly improved strength and plasticity of a refractory high-entropy alloy at small length scale.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,867,8.
MLA	Qu, Ruitao,et al."Significantly improved strength and plasticity of a refractory high-entropy alloy at small length scale".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 867(2023):8.