Positron annihilation study of proton-irradiated reactor pressure vessel steels |
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| Authors: | Xiangbing Liu Rongshan Wang Ai Ren Ping Huang Yichu Wu Jing Jiang Chonghong Zhang Xitao Wang |
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| Institution: | 1. Centre of Plant Life Management, Suzhou Nuclear Power Research Institute, Suzhou 215004, People''s Republic of China;2. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, People''s Republic of China;3. School of Physics and Technology, Hubei Key Laboratory of Nuclear Solid State Physics, Wuhan University, Wuhan 430072, People''s Republic of China;4. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People''s Republic of China;1. Department of Mechanical Engineering, Graduate School of Science and Engineering, Kagoshima University, Korimoto, Kagoshima 890-0065, Japan;2. Research Reactor Institute, Kyoto University, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan;3. Spallation Neutron Source Division, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland;1. Life Management Technology Center, Suzhou Nuclear Power Research Institute, Suzhou 215004, People’s Republic of China;2. School of Physics and Technology, Hubei Key Laboratory of Nuclear Solid State Physics, Wuhan University, Wuhan 430072, People’s Republic of China;3. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China;1. Key Laboratory of Nuclear Radiation and Nuclear Energy Technology, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;2. China Institute of Atomic Energy, Beijing 102413, China;1. Institute of Nuclear Physics Polish Academy of Sciences, ul. E. Radzikowskiego 152, 31 342 Krakow, Poland;2. Joint Institute for Nuclear Research, Joliot-Curie 6, 141980 Dubna, Moscow Region, Russia;1. Multi-Discipline Research Center, Institute of High Energy Physics, CAS, Beijing 100049, China;2. University of Chinese Academy of Sciences, Beijing 100039, China |
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| Abstract: | The microstructures, irradiation-induced defects and changes of mechanical property of Chinese domestic A508-3 steels after proton irradiation were investigated by TEM, positron lifetime, slow positron beam Doppler broadening spectroscopy and hardness measurements. The defects were induced by 240 keV proton irradiation with fluences of 1.25×1017 ions cm?2 (0.26 dpa), 2.5×1017 ions cm?2 (0.5 dpa), and 5.0×1017 ions cm?2 (1.0 dpa). The TEM observation revealed that the as-received steel had typical bainitic–ferritic microstructures. It was also observed that Doppler broadening S-parameter and average lifetime increased with dose level owing to the formation of defects and voids induced by proton irradiation. The correlation between positron parameters and hardness was found. |
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