Impact tension behavior of heavy-drawn nanocrystalline CoCrNi medium entropy alloy wire

doi:10.1016/j.msea.2022.144041

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Impact tension behavior of heavy-drawn nanocrystalline CoCrNi medium entropy alloy wire
	Qiao Y(乔禹); Cao FH(曹富华); Chen Y(陈艳); Wang HY(汪海英); Dai LH(戴兰宏)
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2022-10
卷号	856 页码:144041
关键词	High entropy alloy Wire Split hopkinson tension bar High strain rate Low temperature Plastic deformation
ISSN号	0921-5093
DOI	10.1016/j.msea.2022.144041
英文摘要	High-strength metallic wire is a vital bearing structure used in many industrial fields. Impact loads often challenge the service safety of metal wire in engineering applications. However, few studies have been made on the dynamic mechanical behavior of metallic wires, especially for newly developed high-entropy alloy wires. By equipping split Hopkinson tension bar (SHTB) with specially designed test fixtures, we have carried out a systematic study on the dynamic deformation behavior of the heavily-drawn CoCrNi medium-entropy alloy (MEA) wire in impact tension at both room and cryogenic temperatures. We show that these millimeter-diameter MEA wires with nano-scale grains can achieve an excellent combination of impact tensile strength and ductility at 293 K and 77 K. More interestingly, we find that the strength and ductility of the MEA wire were enhanced simultaneously with decreasing temperature and increasing strain rate. Detailed microstructure characterizations and molecular dynamics simulations reveal that the increased strength and ductility at coupled high strain and low temperature resulted from the multiplication and thinning of nanoscale twins, which further caused additional strengthening and toughening mechanisms such as stack faulting net and secondary twin. This study highlights the advantage of CrCoNi MEA wire for cryogenic temperature and impact applications and provides an experimental reference for the design and evaluation of high-strength metal wires under such extreme conditions.
学科主题	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
分类号	一类
语种	英语
WOS记录号	WOS:000863121900001
资助机构	NSFC [11790292, 12102433, 11972346] ; NSFC Basic Science Center Program [11988102] ; National Natural Science Foundation of China [U2141204] ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences [QYZDJSSW-JSC011] ; opening project of State Key Laboratory of Explosion Science and Technology (Beijing Institute of Technology) [KFJJ18-14 M]
其他责任者	Chen, Y ; Dai, LH (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/90190]
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 Chinese Acad Sci, Sch Future Technol, Beijing 101408, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China 3.Univ Sci & Technol China, Dept Modern Mech, CAS Key Lab Mech Behav & Design Mat, Hefei 230027, Peoples R China 4.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 5.Wang, Hai-Ying 6.Chen, Yan 7.Cao, Fu-Hua 8.[Qiao, Yu
推荐引用方式 GB/T 7714	Qiao Y,Cao FH,Chen Y,et al. Impact tension behavior of heavy-drawn nanocrystalline CoCrNi medium entropy alloy wire[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2022,856:144041.
APA	乔禹,曹富华,陈艳,汪海英,&戴兰宏.(2022).Impact tension behavior of heavy-drawn nanocrystalline CoCrNi medium entropy alloy wire.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,856,144041.
MLA	乔禹,et al."Impact tension behavior of heavy-drawn nanocrystalline CoCrNi medium entropy alloy wire".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 856(2022):144041.