Fracture toughness characterization of JLF-1 steel after irradiation in HFIR to 5 dpa
Fracture toughness characterization of JLF-1 steel after irradiation in HFIR to 5 dpa
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DOI：
10.1016/j.jnucmat.2007.03.100
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发表时间：
2007-08
影响因子：
3.1
通讯作者：
M. Sokolov;A. Kimura;H. Tanigawa;S. Jitsukawa
中科院分区：
文献类型：
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作者：
M. Sokolov;A. Kimura;H. Tanigawa;S. Jitsukawa
在高通量同位素堆中，对铁素体-马氏体钢JLF-1在两种不同温度下辐照前后的断裂韧性进行了研究。小的（直径12.5mm，厚度4.6mm）盘形紧凑拉伸试样在平均温度为250°C和377°C至24 dpa下辐照。将3.33×3.33× 25 mm的小的预裂纹夏比试样在300°C和500°C下辐照至5dpa。对于每个辐照温度和剂量，根据参考温度T0评价转变断裂韧性，并与未辐照的T0进行比较。F82 H和9 Cr2 WVTa钢在相似条件下辐照后，其断裂韧性与T0值相比发生了变化。结果表明，JLF-1、F82 H和9 Cr-2 WVTa钢在250°C ~ 500°C温度范围内，经4-5dpa剂量辐照后，其抗辐照脆化性能非常相似。
Fracture toughness specimens of the ferritic–martensitic steel JLF-1 were investigated before and after irradiation at two different temperatures in the High Flux Isotope Reactor. Small (12.5mm in diameter with thickness of 4.6mm) disk-shaped compact tension specimens were irradiated at average temperatures of ∼250°C and 377°C to ∼4dpa. Small, 3.33×3.33×25mm, pre-cracked Charpy specimens were irradiated at ∼300°C and 500°C to 5dpa. Transition fracture toughness was evaluated in terms of the reference temperature T0for each irradiation temperature and dose and compared to unirradiated T0. Current fracture toughness shifts compared with T0shifts of F82H and 9Cr2WVTa steels irradiated at similar conditions. The present results show that JLF-1, F82H, and 9Cr–2WVTa steels have very similar resistance to radiation embrittlement after doses of 4–5dpa in the temperature range from 250°C to 500°C.