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Microstructure and Mechanical Properties of ITER Correction Coil Case Material
Xin, Jijun1,2; Fang, Chao3; Song, Yuntao3; Wei, Jing3; Huang, Chuanjun4; Libeyre, Paul5; Simon, Fabrice5; Sgobba, Stefano6
2017-09-01
发表期刊IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
卷号27期号:6
摘要The modified 316LN austenitic stainless steel was selected as ITER correction coils case material to provide structural reinforcement to the winding pack. Considering the case structure, high-assembling accuracy and other strict requirements, 316LN in special extruded form has been developed. In the present study, the microstructure and mechanical properties of the material were investigated. The microstructure of the 316LN material was an-alyzed by means of the optical microscopy, transmission electron microscope, and X-ray diffraction. It was observed that the material presents fine grain size and a single austenitic phase. Moreover, the intergranular corrosion resistance of the 316LN was evaluated and the results indicated that it exhibited a remarkable intergranular corrosion resistance. The tensile properties of materials were measured at both room and cryogenic temperatures. The 0.2% offset yield strength (R-p0.2), ultimate tensile strength (R-m), and elongation at break (A) at 4.2 K were determined to be higher than 800 MPa, 1500 MPa, and 40%, respectively. Furthermore, the J-integral fracture toughness of the 316LN was tested through means of an unloading compliance method at 4.2 K and the plane strain fracture toughness K-Ic converted from the J-integral are well above the specified value of 180 MPa root m. In addition, the fatigue test and fatigue crack growth rate of the 316LN stainless steel were also investigated at 4.2 K. According to these results, all requirement of the case material including uniform microstructure, excellent corrosion resistance, and good mechanical properties established by the ITER IO are confirmed.
文章类型Article
关键词Correction Coil (Cc) Extruded Materials Iter Intergranular Corrosion Resistance Microstructure Mechanical Property
WOS标题词Science & Technology ; Technology ; Physical Sciences
DOI10.1109/TASC.2017.2721959
收录类别SCI
语种英语
WOS研究方向Engineering ; Physics
WOS类目Engineering, Electrical & Electronic ; Physics, Applied
WOS记录号WOS:000406433800001
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.hfcas.ac.cn:8080/handle/334002/33551
专题中科院等离子体物理研究所
作者单位1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230026, Peoples R China
2.Univ Sci & Technol China, Hefei 230026, Peoples R China
3.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
4.Chinese Acad Sci, Tech Inst Phys & Chem, State Key Lab Technol Space Cryogen Propellants, Beijing 100190, Peoples R China
5.ITER Org, F-13067 St Paul Les Durance, France
6.CERN, CH-1208 Geneva, Switzerland
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Xin, Jijun,Fang, Chao,Song, Yuntao,et al. Microstructure and Mechanical Properties of ITER Correction Coil Case Material[J]. IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY,2017,27(6).
APA Xin, Jijun.,Fang, Chao.,Song, Yuntao.,Wei, Jing.,Huang, Chuanjun.,...&Sgobba, Stefano.(2017).Microstructure and Mechanical Properties of ITER Correction Coil Case Material.IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY,27(6).
MLA Xin, Jijun,et al."Microstructure and Mechanical Properties of ITER Correction Coil Case Material".IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 27.6(2017).
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