Assessment of Mechanical Properties of Welding Joints for ITER Correction Coils Cases at Cryogenic Temperature
文献类型：期刊论文
| 作者 | Huang, Chuanjun1; Xin, Jijun2; Wei, Jing2 ; Zhang, Hengcheng1; Huang, Rongjin1; Xu, Dong1; Liu, Sheng3; Li, Laifeng1
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| 刊名 | IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
 |
| 出版日期 | 2021-09-01 |
| 卷号 | 31 |
| ISSN号 | 1051-8223 |
| 关键词 | Cryogenic ITER correction coil (CC) case mechanical property microstructures welding joints |
| DOI | 10.1109/TASC.2021.3057330 |
| 通讯作者 | Li, Laifeng(laifengli@mail.ipc.ac.cn) |
| 英文摘要 | To resist large electromagnetic loads, the ITER correction coils (CCs) are protected by a 20-mm thickness 316LN austenitic stainless steel case. Due to the strict tolerance requirement of the case manufacture, tungsten inert gas (TIG) welding technology was used for subcase assembly welding, whereas laser beam welding (LBW) technology was applied to enclosure welding of the cases. The case shall be operated at 4.2 K and shall undergo considerably cyclic stress due to magnet electromagnetization as well as interaction with the toroidal field (TF) and poloidal field (PF). This article focuses on the assessment of the mechanical properties of the welding joints at cryogenic temperature. Results indicated that the values of the ultimate tensile strength of the TIG welding joint and the LBW welding joint were 1555 and 1522 MPa, respectively, which reach to 99.7 and 97.6% of that of the base material (BM). The elongation at the fracture of both the TIG and LBW weldments was larger than 35%. The plane strain fracture toughness K-Ic(J) of the TIG and the LBW weldments was 210 and 241 MPa.m(1/2), respectively. The fractographic analysis indicated that the fracture surface was composed of fine equiaxed dimples, which indicated that both welding joints fractured in a ductile manner. The welding joints survived the minimum of 30 000 cycles fatigue test at stress level and load ratio specified by the ITER document. In addition, the fatigue crack growth rates of both welding joints were lower than that of the BM. All mechanical properties of both the welding joints satisfied the ITER specifications. |
| WOS关键词 | STAINLESS-STEEL |
| 资助项目 | National Key R&D Program of China[2017YFE0301405] ; National Key R&D Program of China[2017YFE0301504] ; National Natural Science Foundation of China[51877209] |
| 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:000708645100001 |
| 资助机构 | National Key R&D Program of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/125621]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Li, Laifeng |
| 作者单位 | 1.Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Cryogen, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 3.China Int Nucl Fus Energy Program Execut Ctr, Beijing 100862, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, Chuanjun,Xin, Jijun,Wei, Jing,et al. Assessment of Mechanical Properties of Welding Joints for ITER Correction Coils Cases at Cryogenic Temperature[J]. IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY,2021,31. |
| APA | Huang, Chuanjun.,Xin, Jijun.,Wei, Jing.,Zhang, Hengcheng.,Huang, Rongjin.,...&Li, Laifeng.(2021).Assessment of Mechanical Properties of Welding Joints for ITER Correction Coils Cases at Cryogenic Temperature.IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY,31. |
| MLA | Huang, Chuanjun,et al."Assessment of Mechanical Properties of Welding Joints for ITER Correction Coils Cases at Cryogenic Temperature".IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 31(2021). |
入库方式： OAI收割
来源：合肥物质科学研究院
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