Effect of helium concentration on irradiation damage of Fe-ion irradiated SIMP steel at 300℃ and 450℃

被引：0
作者：
杨振 [1 ]
杨浚源 [2 ]
廖庆 [2 ]
徐帅 [2 ]
李炳生 [2 ]
机构：
[1] Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University
[2] State Key Laboratory for Environment-Friendly Energy Materials, Southwest University of Science and Technology
来源：
Chinese Physics B | 2021年 / 30卷 / 05期
关键词：
D O I：
暂无
中图分类号：
TG142.24 [马氏体钢（马丁钢）]; TL34 [反应堆材料及其性能]; TL50 [一般性问题];
学科分类号：
080502 ; 082701 ;
摘要：
SIMP steel is newly developed fully martensitic steel for lead-cooled fast reactors and accelerator-driven systems.It is important to evaluate its radiation resistance via high flux neutron irradiation, where dense He atoms can be formed via(n, α) transmutation reaction. Co-irradiation with Fe and He ions, instead of neutron, was performed. Specimens were irradiated with 6.4-Me V Fe ions to the damage dose of 5 dpa at a depth of 600 nm. Three different helium injection ratios of 60-appm He/dpa(dpa: displacements per atom), 200-appm He/dpa and 600-appm He/dpa at a depth of 600 nm,were performed. Two different irradiation temperatures of 300℃ and 450℃ were carried out. The effect of helium concentration on the microstructure of Fe-irradiated SIMP steel was investigated. Microstructural damage was observed using transmission electron microscopy. The formed dislocation loops and bubbles depended on the helium injection ratio and irradiation temperature. Lots of dislocation loops and helium bubbles were homogeneously distributed at 300℃, but not at 450℃. The causes of observed effects are discussed.
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页码：469 / 474
页数：6
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