Cryogenic fracture and adiabatic heating of austenitic stainless steels for superconducting fusion magnets
Cryogenic fracture and adiabatic heating of austenitic stainless steels for superconducting fusion magnets
复制标题
超导熔变磁体用奥氏体不锈钢的低温断裂和绝热加热
DOI：
10.1016/s1468-6996(03)00063-9
复制
发表时间：
2003
影响因子：
5.5
通讯作者：
K. Horiguchi
中科院分区：
文献类型：
--
作者：
Y. Shindo;K. Horiguchi
本文讨论了可用于磁聚变反应堆超导磁体低温结构的奥氏体不锈钢的断裂和绝热加热。在 4 K 液氦中对致密样品进行弹塑性断裂韧性测试。通过测量内部温度来检测绝热加热。研究了试样尺寸和侧槽对低温断裂韧性以及动态裂纹扩展过程中温升的影响。对于侧槽样品，会产生与尺寸无关的韧性参数。还讨论了夹杂物含量对断裂力学参数的影响。
This paper discusses the fracture and the adiabatic heating of austenitic stainless steels that may be used in cryogenic structures for the superconducting magnets of magnetic fusion reactors. Elastic–plastic fracture toughness tests were performed on compact specimens in liquid helium at 4 K. Adiabatic heating was detected by measuring the internal temperature. The effect of test specimen size and side grooving on the cryogenic fracture toughness, and the temperature rise during dynamic crack growth are examined. A size independent toughness parameter results in the case of side-grooved specimens. The effect of inclusion content on the fracture mechanics parameters is also discussed.