Effects of minor alloying addition on He bubble formation in the irradiated FeCoNiCr-based high-entropy alloys

doi:10.1016/j.jnucmat.2020.152458

	Effects of minor alloying addition on He bubble formation in the irradiated FeCoNiCr-based high-entropy alloys
	Chen, Da 1,5; Zhao, Shijun 1,5; Sun, Jianrong 2,4; Tai, Pengfei 2,4; Sheng, Yanbin 2,4; Yeli, Guma 1,5; Zhao, Yilu 1,5; Liu, Shaofei 1,5; Lin, Weitong 1,5; Kai, Wu 3
刊名	JOURNAL OF NUCLEAR MATERIALS
	2020-12-15
卷号	542 页码:10
关键词	High-entropy alloy Minor alloying Helium bubble Vacancy migration Phase stability
ISSN号	0022-3115
DOI	10.1016/j.jnucmat.2020.152458
通讯作者	Zhao, Shijun(shijzhao@cityu.edu.hk) ; Sun, Jianrong(sunjr@impcas.ac.cn) ; Kai, Ji-Jung(jijkai@cityu.edu.hk)
英文摘要	Minor alloying with specific elements is an effective approach to tailor material's properties, but it has not been introduced to modify the radiation effects of high-entropy alloys (HEAs), which are a promising material for nuclear application. In the work, a 0.2 molar ratio of Al/Cu/Ti was respectively added into the quaternary FeCoNiCr HEA, they were then irradiated by 2 MeV He ions at four temperatures from 673 to 973 K. After irradiation, He bubble behavior in specimens were investigated by the transmission electron microscopy (TEM). The results showed that bubbles in the minor alloying HEAs usually had a larger size, lower number density, and broader distribution range, comparing to their parent alloy. Such effects were more significant at a higher irradiation temperature and most pronounced by the Ti-addition. Atomistic simulations revealed that such minor alloying addition could relatively reduce the energy barrier for vacancy migration and formation in FeCoNiCr system, which thereby promotes He diffusion through the replacement or vacancy mechanism. The theoretical models for He bubble formations verified our results that a higher He diffusivity in the minor alloying HEAs can enhance bubble growth and lower its nucleation numbers during irradiation. The phase stability of irradiated HEAs were also examined and its potential influences on bubble evolution were pointed out. This study provides insights on tailoring radiation defects via the conventional alloying strategy. (C) 2020 Published by Elsevier B.V.
资助项目	Hong Kong Research Grant Council (RGC)[CityU 11212915] ; Hong Kong Research Grant Council (RGC)[CityU 11205018] ; Hong Kong Research Grant Council (RGC)[CityU 21200919] ; City University of Hong Kong[9610425] ; National Natural Science Foundation of China (NSFC)[91426304] ; National Natural Science Foundation of China (NSFC)[11427904] ; National Natural Science Foundation of China (NSFC)[11275005] ; National Natural Science Foundation of China (NSFC)[11975193] ; Guangdong Basic and Applied Basic Research Foundation[2019A1515011528] ; Shenzhen Basic Research Program[JCYJ20190808181601662]
WOS关键词	316L STAINLESS-STEEL ; HELIUM ACCUMULATION ; ION-IRRADIATION ; PHASE-STABILITY ; VOID FORMATION ; EVOLUTION ; BEHAVIOR ; NICKEL ; ENERGY ; NI
WOS研究方向	Materials Science ; Nuclear Science & Technology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000583242500019
资助机构	Hong Kong Research Grant Council (RGC) ; City University of Hong Kong ; National Natural Science Foundation of China (NSFC) ; Guangdong Basic and Applied Basic Research Foundation ; Shenzhen Basic Research Program
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/139409]
专题	中国科学院近代物理研究所
通讯作者	Zhao, Shijun; Sun, Jianrong; Kai, Ji-Jung
作者单位	1.City Univ Hong Kong, Dept Mech Engn, Hong Kong, Peoples R China 2.Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China 3.Natl Taiwan Ocean Univ, Inst Mat Engn, Keelung 20224, Taiwan 4.Chinese Acad Sci, Inst Modern Phys, Lanzhou 710000, Peoples R China 5.City Univ Hong Kong, Ctr Adv Nucl Safety & Sustainable Dev, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Chen, Da,Zhao, Shijun,Sun, Jianrong,et al. Effects of minor alloying addition on He bubble formation in the irradiated FeCoNiCr-based high-entropy alloys[J]. JOURNAL OF NUCLEAR MATERIALS,2020,542:10.
APA	Chen, Da.,Zhao, Shijun.,Sun, Jianrong.,Tai, Pengfei.,Sheng, Yanbin.,...&Kai, Ji-Jung.(2020).Effects of minor alloying addition on He bubble formation in the irradiated FeCoNiCr-based high-entropy alloys.JOURNAL OF NUCLEAR MATERIALS,542,10.
MLA	Chen, Da,et al."Effects of minor alloying addition on He bubble formation in the irradiated FeCoNiCr-based high-entropy alloys".JOURNAL OF NUCLEAR MATERIALS 542(2020):10.