Numerical analysis of recrystallization behaviors for W monoblock under cyclic high heat flux

doi:10.1016/j.nme.2022.101227

	Numerical analysis of recrystallization behaviors for W monoblock under cyclic high heat flux
	Li, Changjun 1; Zhu, Dahuan 1; Ding, Rui 1; Guo, Zongxiao 1,2; Xuan, Chuannan 1,2; Chen, Junling 1
刊名	NUCLEAR MATERIALS AND ENERGY
	2022-09-01
卷号	32
关键词	Recrystallization Monoblock High heat flux Plasma facing component Numerical analysis
DOI	10.1016/j.nme.2022.101227
通讯作者	Zhu, Dahuan(dhzhu@ipp.ac.cn)
英文摘要	The W/Cu monoblock for divertor target will be exposed to cyclic (---300 cycles) and extremely high heat flux up to 20 MW/m2 in ITER, which may lead to significant macro cracking and W recrystallization according to existing high heat flux tests. Currently, the degradation of W mechanical properties due to W recrystallization, is regarded as one of the most important factors on cracking formation as well as the lifetime of W components. Therefore, to effectively predict W recrystallization behaviors, a method to simulate the evolution and distribution of W recrystallized fraction during the non-isothermal process was introduced. Coupling with finite element thermal analysis, W recrystallization gradients are successfully obtained. The numerical analysis results show very good agreement with those from existing experiments [1]. Further simulations of different heat flux density (15 MW/m2 - 30 MW/m2) and cyclic number (1-104) with heating time of 5 s, 8 s and 10 s were also carried out. It is found that the shape of the final recrystallized W region is according with the isothermal diagram at the end of the heating stage. In particular, the specific temperature of the corresponding isothermal line can be estimated by heating time and cyclic number. A fitting empirical equation was also given, which can be used to make fast prediction of recrystallization depth by comparing with isothermal diagram for such high heat flux tests. This method underlines the high potential to predict the recrystallization behavior of the W plasmafacing component under complex plasma heat flux in fusion devices.
资助项目	National Key R & D Program of China[2022YFE03030000] ; National Natural Science Foundation of China[U21A20439] ; National Natural Science Foundation of China[12022511] ; Collaborative Innovation Program of Hefei Science Center, CAS[2020HSC-CIP006] ; Key Research Program of Frontier Sciences, CAS[ZDBS-LY-SLH010] ; CASHIPS Director's Fund[BJPY2019B01]
WOS关键词	WARM-ROLLED TUNGSTEN ; KINETICS
WOS研究方向	Nuclear Science & Technology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000862586000001
资助机构	National Key R & D Program of China ; National Natural Science Foundation of China ; Collaborative Innovation Program of Hefei Science Center, CAS ; Key Research Program of Frontier Sciences, CAS ; CASHIPS Director's Fund
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/129121]
专题	中国科学院合肥物质科学研究院
通讯作者	Zhu, Dahuan
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, HFIPS, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Sci Isl Branch Grad Sch, Hefei 230021, Peoples R China
推荐引用方式 GB/T 7714	Li, Changjun,Zhu, Dahuan,Ding, Rui,et al. Numerical analysis of recrystallization behaviors for W monoblock under cyclic high heat flux[J]. NUCLEAR MATERIALS AND ENERGY,2022,32.
APA	Li, Changjun,Zhu, Dahuan,Ding, Rui,Guo, Zongxiao,Xuan, Chuannan,&Chen, Junling.(2022).Numerical analysis of recrystallization behaviors for W monoblock under cyclic high heat flux.NUCLEAR MATERIALS AND ENERGY,32.
MLA	Li, Changjun,et al."Numerical analysis of recrystallization behaviors for W monoblock under cyclic high heat flux".NUCLEAR MATERIALS AND ENERGY 32(2022).