HFCAS OpenIR  > 中科院等离子体物理研究所
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
AbstractThe 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.
KeywordCorrection Coil (Cc) Extruded Materials Iter Intergranular Corrosion Resistance Microstructure Mechanical Property
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
Indexed BySCI
WOS Research AreaEngineering ; Physics
WOS SubjectEngineering, Electrical & Electronic ; Physics, Applied
WOS IDWOS:000406433800001
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.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
Recommended Citation
GB/T 7714
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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