Study on development policy for new cryogenic structural material for superconducting magnet of fusion reactor
Study on development policy for new cryogenic structural material for superconducting magnet of fusion reactor
复制标题
聚变反应堆超导磁体新型低温结构材料发展政策研究
DOI：
10.1016/j.nme.2022.101125
复制
发表时间：
2022
影响因子：
2.6
通讯作者：
Komatsu Masayuki
中科院分区：
文献类型：
--
作者：
Nishimura Arata;Ono Yoshinori;Umezawa Osamu;Kumagai Susumu;Kato Yohko;Kato Tetsuya;Yuri Tetsumi;Komatsu Masayuki
聚变演示将需要包括TF线圈外壳在内的大规模低温结构。由于巨大的电磁力，将供应超厚的板材和/或锻造产品。由于巨型块体的中段比块体表面区较弱，设计屈服应力必须考虑到这一强度较低的部分。为寻求提高中段强度的制造工艺，结合碳、氮固溶体强化，提出了细化强化和析出强化相结合的方法。以XM-19为研究对象，根据屈服应力和断裂韧性的变化规律，试制了100 mm厚的块体和30 mm厚的板材，并对其中段的强度和断裂韧性进行了评定。本研究将提供聚变反应堆用新型低温结构材料的实验数据，并讨论其发展策略。
A fusion DEMO will require large-scale cryogenic structure including TF coil cases. Because of huge electromagnetic forces, extra thick plates and/or wrought products will be supplied. Since the midsection of the huge block is weaker than the block surface region, the design yield stress must be determined taking account of this lower strength part. To search the manufacturing process to improve the midsection strength, the crystal refinement strengthening and the precipitation strengthening are considered together with the carbon and nitrogen solid solution strengthening. XM-19 was focused based on the variation of the yield stress and the fracture toughness, a 100 mm thick block and a 30 mm thick plate were trial produced, and strength and the fracture toughness at the midsection were evaluated. This study will present the experimental data and discuss the development policy for a new cryogenic structural material for a fusion reactor.