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Regulating mechanical properties of laser powder bed fusion manufactured CoCrFeMnNi high-entropy alloy using oversaturated boron doping

文献类型：期刊论文

作者Zhang, Ruize4; Yao, Haihua3; Lin, Xin2; Gao, Jiahui4; Guo, Zhuofei4; Gong, Jiaxin3; Zhao, Yu1; Tan, Zhen4; He, Dingyong4; Zhou, Zheng4
刊名VIRTUAL AND PHYSICAL PROTOTYPING
出版日期2025-12-31
卷号20期号:1页码:18
关键词High-entropy alloys boron doping microstructure tensile behaviour LPBF
ISSN号1745-2759
DOI10.1080/17452759.2025.2470923
通讯作者Yao, Haihua(yaohaihua@bjut.edu.cn) ; Lin, Xin(linxin_bit@imech.ac.cn) ; Zhou, Zheng(zhouzhengbjut@bjut.edu.cn)
英文摘要The laser powder bed fusion (LPBF) manufactured CoCrFeMnNi high-entropy alloy (HEA) presents potential application at cryogenic temperatures, except for a relatively low yield strength (sigma y). In this work, we proposed an oversaturated boron-doping strategy to overcome this insufficiency. Compared to the boron-free and high boron-doping references, the moderate boron-doping LPBF HEA exhibits high strength at temperatures of 77 and 298 K, while maintains favourable ductility, corresponding to a sigma y of 806 MPa with a total elongation (& varepsilon;) of similar to 20% at 298 K, and a sigma y of 1072 MPa with a & varepsilon; of similar to 12% at 77 K, respectively. The improved mechanical properties are attributed to the microstructures composed of refined grains, reduced cell size, oversaturation of boron and the formation of nano-sized Cr2B precipitates at cell boundaries. The grain boundary strengthening, precipitation strengthening, solid solution strengthening and dislocation strengthening contribute to the high sigma y. The interactions between dislocation slip and deformation twins with boride precipitates account for the enhanced strain hardening and favourable plasticity at 77 K. The results demonstrate an effective strategy to establish balanced mechanical properties of LPBF HEA, and provide an inspiration for future works aiming to develop high-performance structural materials over a wide temperature range.
WOS关键词STRENGTHENING MECHANISMS ; COMPRESSIVE DEFORMATION ; MICROSTRUCTURE ; STRESS ; ENERGY ; EVOLUTION ; BEHAVIOR ; METALS ; MODEL ; HEAT
资助项目National Natural Science Foundation of China[52001025] ; National Natural Science Foundation of China[52371043] ; National Natural Science Foundation of China[51771005] ; National Natural Science Foundation of China[52171060] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB0620202]
WOS研究方向Engineering ; Materials Science
语种英语
WOS记录号WOS:001439720500001
资助机构National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences
源URL[http://dspace.imech.ac.cn/handle/311007/100235]  
专题力学研究所_高温气体动力学国家重点实验室
通讯作者Yao, Haihua; Lin, Xin; Zhou, Zheng
作者单位1.AECC Hunan Aviat Powerplant Res Inst, Zhuzhou, Peoples R China
2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
3.Beijing Univ Technol, Sch Phys & Optoelect Engn, Beijing 100124, Peoples R China
4.Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Ruize,Yao, Haihua,Lin, Xin,et al. Regulating mechanical properties of laser powder bed fusion manufactured CoCrFeMnNi high-entropy alloy using oversaturated boron doping[J]. VIRTUAL AND PHYSICAL PROTOTYPING,2025,20(1):18.
APA Zhang, Ruize.,Yao, Haihua.,Lin, Xin.,Gao, Jiahui.,Guo, Zhuofei.,...&Zhou, Zheng.(2025).Regulating mechanical properties of laser powder bed fusion manufactured CoCrFeMnNi high-entropy alloy using oversaturated boron doping.VIRTUAL AND PHYSICAL PROTOTYPING,20(1),18.
MLA Zhang, Ruize,et al."Regulating mechanical properties of laser powder bed fusion manufactured CoCrFeMnNi high-entropy alloy using oversaturated boron doping".VIRTUAL AND PHYSICAL PROTOTYPING 20.1(2025):18.

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来源：力学研究所

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