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Microstructure and Mechanical Properties of the Enclosure Welding Joint for ITER Correction Coils Cases

文献类型：期刊论文

作者Xin, Jijun3,4; Fang, Chao5; Yang, Wuxiong6; Huang, Chuanjun1; Dai, Wenhua5; Wei, Jing5; Song, Yuntao5; Li, Laifeng1; Fabrice, Simon7; Paul, Libeyre7
刊名IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
出版日期2020-09-01
卷号30
ISSN号1051-8223
关键词Welding Microstructure Coils Power lasers Laser fusion Morphology Surface morphology Case enclosure welding ITER correction coil (CC) mechanical properties microstructure
DOI10.1109/TASC.2020.2976588
通讯作者Huang, Chuanjun(cjhuang@mail.ipc.ac.cn) ; Wei, Jing(jingw@ipp.ac.cn)
英文摘要To resist the alternating electromagnetic loads, the International Thermonuclear Experimental Reactor (ITER) correction coils are protected by a 20-mm-thick 316LN austenitic stainless steel case. According to the strict tolerance requirement of the case manufacture, laser welding was applied to enclosure welding of the cases with a 20-kW high-power laser for root pass and Tungsten Inert Gas welding was applied for filler and cover passes. In this study, the microstructure and mechanical properties of enclosure welding joint were investigated to evaluate the quality of the joints. No porosity, crack or lack of fusion was found on the cross-section of the joints. The microstructure in the weld zone is single austenite phase and the morphology of the joint consists of cellular crystal, columnar crystal, and small amount of the equiaxed grain. The average tensile strength of the joint is 590 MPa, which is 98.3 & x0025; of the strength of the base material of 600 MPa. The fracture position is located at the base material with an apparent necking morphology, which confirmed the good plasticity. The side bend test specimens were subjected to significant plastic deformation, which bent through 180 & x00B0; and no surface crack can be found. The impact toughness of the weld joint at 4.2 K is larger than 180 J & x002F;cm(2), and the fracture surface is composed of fine equiaxed dimples and tearing ridges, which indicates that the specimens failed in a ductile manner. All of the test results satisfy the ITER requirements.
资助项目National Science Fund for Distinguished Young Scholars[51525703] ; CNDA ; ITER IO
WOS研究方向Engineering ; Physics
语种英语
出版者IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
WOS记录号WOS:000530423700001
资助机构National Science Fund for Distinguished Young Scholars ; CNDA ; ITER IO
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/103319]  
专题中国科学院合肥物质科学研究院
通讯作者Huang, Chuanjun; Wei, Jing
作者单位1.Chinese Acad Sci, State Key Lab Technol Space Cryogen Propellants, Tech Inst Phys & Chem, Beijing 100190, Peoples R China
2.CERN, Geneva 1211, Switzerland
3.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
4.Univ Sci & Technol China, Hefei 230026, Peoples R China
5.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
6.Beijing Univ Technol, High Power & Ultrafast Laser Mfg Lab, Inst Laser Engn, Beijing 100124, Peoples R China
7.ITER Org, Route Vinon Sur Verdon, St Paul Les Durance 13067, France
推荐引用方式
GB/T 7714		 Xin, Jijun,Fang, Chao,Yang, Wuxiong,et al. Microstructure and Mechanical Properties of the Enclosure Welding Joint for ITER Correction Coils Cases[J]. IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY,2020,30.
APA Xin, Jijun.,Fang, Chao.,Yang, Wuxiong.,Huang, Chuanjun.,Dai, Wenhua.,...&Sgobba, Stefano.(2020).Microstructure and Mechanical Properties of the Enclosure Welding Joint for ITER Correction Coils Cases.IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY,30.
MLA Xin, Jijun,et al."Microstructure and Mechanical Properties of the Enclosure Welding Joint for ITER Correction Coils Cases".IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 30(2020).

入库方式： OAI收割

来源：合肥物质科学研究院

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