Study on electron beam welding process of the first wall of water-cooled ceramic breeder (WCCB) blanket

doi:10.1016/j.fusengdes.2021.112927

	Study on electron beam welding process of the first wall of water-cooled ceramic breeder (WCCB) blanket
	Zhang, Yong 1,4; Wu, Jiefeng 2,4; Liu, Zhihong 2,4; Liu, Songlin 4; Lei, Mingzhun 4; Wang, Wanjing 4; Atif, Muhammad 3; Liu, Zhenfei 2,4; Ma, Jianguo 2,4
刊名	FUSION ENGINEERING AND DESIGN
	2021-12-01
卷号	173
关键词	Electron beam welding Blanket First wall Mechanical properties Welding technology
ISSN号	0920-3796
DOI	10.1016/j.fusengdes.2021.112927
通讯作者	Ma, Jianguo(mjg@ipp.ac.cn)
英文摘要	Water- cooled ceramic breeder (WCCB) blanket is one of the candidate blanket for China Fusion Engineering Test Reactor (CFETR) independently developed by China Institute of plasma physics. The first wall (FW) is a component of WCCB, which directly faces the plasma. FW contains flow channels and has complex shape structure, therefore, it is difficult to complete the full-scale manufacturing by one kind of welding process. Hence, in the development process, the components of FW are first connected by hot isostatic pressing (HIP), and then connected by electron beam welding (EBW), so as to form the full-scaled FW connection. In this paper, the EBW process of FW was studied. The results showed that when the electron beam current was 50 mA and the focus was on the surface, the welded joint with 20 mm penetration and good shape can be formed. After the one time welding and the twice welding (overlapping first welding) of the weld, the tensile test fracture occurred in the base metal. The impact energy of the one time welding was 13 MPa, 18 MPa, and 21 MPa, respectively, and the impact energy of the twice welding was 19 MPa, 20 MPa, and 51 MPa, respectively. The microstructure of the joint was composed of delta-ferrite and lath martensite. When the weld penetration was increased to 50 mm, the lower the focus is, the smaller the porosity at the bottom of the weld is. Similarly, when the lower focus was used, the porosity at the bottom of the weld disappeared basically; The EBW test on the scaled FW with W/Cu sheets showed that when the we took the test pieces with the W-Cu sheet spacing is 4 mm, the welded joint with good surface shape and no internal defects can be formed without scanning deflection electron beam welding, and ultrasonic testing showed that EBW does not affect on the HIP interface. This provides a favorable basis for the future test of equal ratio FW test piece and the welding of actual FW.
资助项目	National Key R&D Program of China[2017YFE03004] ; National Key R&D Program of China[2017YFE03003]
WOS关键词	CONCEPTUAL DESIGN
WOS研究方向	Nuclear Science & Technology
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000722687300005
资助机构	National Key R&D Program of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/126748]
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, Hefei 230026, Peoples R China 2.Anhui Prov Key Lab Special Welding Technol, Huainan 232000, Peoples R China 3.Univ Siegen, Dept Chem, Macromol Chem, Adolf Reichwein Str 2, D-57076 Siegen, Germany 4.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yong,Wu, Jiefeng,Liu, Zhihong,et al. Study on electron beam welding process of the first wall of water-cooled ceramic breeder (WCCB) blanket[J]. FUSION ENGINEERING AND DESIGN,2021,173.
APA	Zhang, Yong.,Wu, Jiefeng.,Liu, Zhihong.,Liu, Songlin.,Lei, Mingzhun.,...&Ma, Jianguo.(2021).Study on electron beam welding process of the first wall of water-cooled ceramic breeder (WCCB) blanket.FUSION ENGINEERING AND DESIGN,173.
MLA	Zhang, Yong,et al."Study on electron beam welding process of the first wall of water-cooled ceramic breeder (WCCB) blanket".FUSION ENGINEERING AND DESIGN 173(2021).