Influence of Different Beam Oscillation Patterns in Electron Beam Welding of Niobium Sheets with Different Thickness

doi:10.3390/ma15113778

	Influence of Different Beam Oscillation Patterns in Electron Beam Welding of Niobium Sheets with Different Thickness
	Tao, Jia 1,2; Wu, Jiefeng 2,3; Liu, Zhihong 2,3; Ma, Jianguo 2,3; Liu, Zhenfei 3; Peng, Wuqingliang 1,2
刊名	MATERIALS
	2022-06-01
卷号	15
关键词	iris weld niobium sheets electron beam welding oscillating patterns EBSD mechanical properties low temperature
DOI	10.3390/ma15113778
通讯作者	Ma, Jianguo(mjg@ipp.ac.cn)
英文摘要	The electron beam welding of the tubes and the half-cells for our 1.3 GHz single-cell superconducting radiofrequency (SRF) cavities is complex due to the different thicknesses of the tubes and the half-cells in the iris region. However, the mechanical properties and microstructure of the iris welds in niobium SRF cavities have barely been explored in previous studies. For high-quality iris welds, welding experiments of niobium sheets of 2 mm and 2.8 mm were carried out under different oscillating conditions. The results show that welding with no oscillation or sinusoidal oscillation may not be applied in actual welding owing to the large misalignment of the bottom surface. The weld grains were not significantly refined through beam oscillation. The joints with infinity oscillation had a higher elongation than circular oscillation, which exhibited a brittle fracture in the tensile tests at 77 K. Nevertheless, the texture of the weld with infinity oscillation implies poor formability, so the feasibility of infinity oscillation in actual welding needs verification in future study.
资助项目	Anhui Provincial Key Research and Development Plan[202104a05020079]
WOS关键词	MECHANICAL-PROPERTIES ; MICROSTRUCTURE EVOLUTION ; CAVITY ; PRESSURE ; SINGLE ; ALLOY ; GAS
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
语种	英语
出版者	MDPI
WOS记录号	WOS:000810019800001
资助机构	Anhui Provincial Key Research and Development Plan
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/131323]
专题	中国科学院合肥物质科学研究院
通讯作者	Ma, Jianguo
作者单位	1.Univ Sci & Technol China, Sci Isl Branch, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, HFIPS, Hefei 230031, Peoples R China 3.Anhui Prov Key Lab Special Welding Technol, Huainan 232000, Peoples R China
推荐引用方式 GB/T 7714	Tao, Jia,Wu, Jiefeng,Liu, Zhihong,et al. Influence of Different Beam Oscillation Patterns in Electron Beam Welding of Niobium Sheets with Different Thickness[J]. MATERIALS,2022,15.
APA	Tao, Jia,Wu, Jiefeng,Liu, Zhihong,Ma, Jianguo,Liu, Zhenfei,&Peng, Wuqingliang.(2022).Influence of Different Beam Oscillation Patterns in Electron Beam Welding of Niobium Sheets with Different Thickness.MATERIALS,15.
MLA	Tao, Jia,et al."Influence of Different Beam Oscillation Patterns in Electron Beam Welding of Niobium Sheets with Different Thickness".MATERIALS 15(2022).