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| Hardening Behavior of China RPV Steel A508-3 Under Irradiation with High Energy Heavy Ions |
| Received:June 08, 2021 Revised:July 26, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2022.01.006 |
| KeyWord:ion irradiation A508-3 steel irradiation hardening yield strength |
| Author | Institution |
| DING Zhao-nan |
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou , China |
| ZHANG Xian-long |
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou , China |
| CHEN Yu-guang |
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou , China |
| YANG Yi-tao |
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou , China |
| ZHANG Chong-hong |
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou , China |
| LIU Xiang-bing |
Life Management Technology Center, Suzhou Nuclear Power Research Institute, Suzhou , China |
| XUE fei |
Life Management Technology Center, Suzhou Nuclear Power Research Institute, Suzhou , China |
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| Abstract: |
| The paper aims to study hardening behavior of Chinese domestic RPV steel A508-3 irradiated with high energy heavy ion at 563 K. Specimens of the A508-3 steels were irradiated with 352.8 MeV Fe21+ ions provided by a terminal of cyclotron to three successively increasing damage levels of 0.15, 0.30 and 1.50 displacements per atom (dpa). A quasi-uniform atomic displacement plateau was produced in the specimens from the near surface to a depth of 25 μm by using an energy degrader. A nanoindentor and a Vickers micro-hardness tester were used to measure the hardness of the specimens. Considering the influence of indentation size effect, the Nix Gao model is used to fit the hardness data. It is observed that the soft substrate effect can be diminished substantially in the irradiated specimens due to the thick damaged regions produced by the Fe ions. The results show that the hardening phenomenon is observable after irradiation, and the hardening increment tends to be saturated with the increase of irradiation dose. The linear relationship between microhardness and nanohardness (Hv0=0.85 H0) was obtained by the microhardness data of 0.15 dpa sample before and after irradiation. A power law relationship between the yield strength increment and the irradiation damage dose is proposed based on the hardness data of A508-3 before and after irradiation, which provides basic data for the study of neutron-ion irradiation hardening mapping relationship of A508-3 steel. |
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