Effect of nickel content on the neutron irradiation embrittlement of Ni-Mo-Cr steels

被引:0
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作者
Chang-Hoon Lee
R. Kasada
A. Kimura
Bong-Sang Lee
Dong-Woo Suh
Hu-Chul Lee
机构
[1] Korea Institute of Materials Science,Institute of Advanced Energy
[2] Kyoto University,undefined
[3] Korea Atomic Energy Research Institute,undefined
[4] POSTECH,undefined
[5] Graduate Institute of Ferrous Technology,undefined
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关键词
alloys; microstructure; fracture; neutron; ductile-to-brittle transition temperature (DBTT);
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摘要
The influence of nickel on the neutron irradiation embrittlement of Ni-Mo-Cr reactor pressure vessel (RPV) steels was investigated using alloys containing nickel in the range of 0.9–3.5 wt%. In all investigated alloys, the neutron irradiation with two dose conditions of 4.5 × 1019 neutron/cm2 at 290 °C and 9.0 × 1019 neutron/cm2 at 290 °C, respectively, increased the hardness and ductile-to-brittle transition temperature (DBTT). However, the increases of the hardness and DBTT resulting from the neutron irradiation were primarily affected by the irradiation dose that is closely related to the generation of irradiation defects, but not by the nickel content. In addition, a linear relationship between the changes in the hardness and DBTT subjected to the irradiation was confirmed. These results demonstrate that increasing the nickel content up to 3.5 wt% does not have a harmful effect on the irradiation embrittlement of Ni-Mo-Cr reactor pressure vessel (RPV) steels.
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页码:1203 / 1208
页数:5
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