Study on Formability Improvement of Zr-4 Sheets Based on Texture Optimization

doi:10.3390/met14060725

IMR OpenIR

	Study on Formability Improvement of Zr-4 Sheets Based on Texture Optimization
	Liu, Huan 1; Song, Hong-Wu 2; Deng, Si-Ying 2; Chen, Shuai-Feng 2; Zhang, Shi-Hong 2
通讯作者	Song, Hong-Wu(hwsong@imr.ac.cn)
	2024-06-01
发表期刊	METALS
卷号	14 期号:6 页码:11
摘要	A positioning grid is a key clamping structure for fixing the transverse and axial positions of fuel assemblies in nuclear reactors, and it is generally prepared by the transverse stamping of a Zr-4 sheet. However, the texture formed in the processing process of Zr-4 sheets can affect formability, resulting in cracking in the stamping process. Therefore, the relationship between the formability of Zr-4 sheets and the normal Kearns factor (Fn) of basal texture was studied in this paper. The results showed that the Zr-4 sheet with an Fn equaling 0.720, prepared by an isobaric reduction rolling process, would crack in the stamping process. To avoid the cracking during stamping, the formability improvement of Zr-4 sheets based on texture optimization was discussed. By using the finite element model (FEM) and a visco plastic self-consistent (VPSC) model coupled simulation, the relationship between the initial textures and formabilities of Zr-4 sheet is established. It is found that the hardening exponents (n) decreased with increasing Fns in VPSC simulations. Meanwhile, as the Fn increases, cracks are prone to occur at the bottom corner of the stamped sheet in finite element simulation. Given the results from FEM and VPSC simulations, it is proposed that the Fn should be controlled to be less than 0.7 for preventing cracks in the sheet during stamping. Additionally, a new rolling process named non-isobaric reduction rolling was designed in which the Fn of the Zr-4 sheet is successfully reduced to 0.690. The stamping results indicate that the sheet is free of cracks under an Fn of 0.690. Therefore, texture optimization with the proposed rolling process can improve the formability of Zr-4 sheets, which effectively solves the cracking problem of Zr-4 sheets.
关键词	Zr-4 sheet texture formability cold-rolled process stamping
资助者	National funded postdoctoral researcher program ; National Natural Science Foundation of China
DOI	10.3390/met14060725
收录类别	SCI
语种	英语
资助项目	National funded postdoctoral researcher program[GZC20231729] ; National Natural Science Foundation of China[52105413]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001256195000001
出版者	MDPI
引用统计	被引频次：1[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/321006/187501
专题	中国科学院金属研究所
通讯作者	Song, Hong-Wu
作者单位	1.Shenyang Ligong Univ, Sch Automobiles & Transportat, Shenyang 110159, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Liu, Huan,Song, Hong-Wu,Deng, Si-Ying,et al. Study on Formability Improvement of Zr-4 Sheets Based on Texture Optimization[J]. METALS,2024,14(6):11.
APA	Liu, Huan,Song, Hong-Wu,Deng, Si-Ying,Chen, Shuai-Feng,&Zhang, Shi-Hong.(2024).Study on Formability Improvement of Zr-4 Sheets Based on Texture Optimization.METALS,14(6),11.
MLA	Liu, Huan,et al."Study on Formability Improvement of Zr-4 Sheets Based on Texture Optimization".METALS 14.6(2024):11.