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Comparison of helium bubble formation in F82H, ODS, SIMP and T91 steels irradiated by Fe and He ions simultaneously

Chinese Physics B 2021年第3期30卷 386-393页

作者： Bingsheng Li Zhen Yang Shuai Xu Kongfang Wei Zhiguang Wang Tielong Shen Tongmin Zhang Qing Liao State Key Laboratory for Environment-Friendly Energy Materials Southwest University of Science and TechnologyMianyang 621010China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China

Ferritic-martensitic steels and ODS steels are attractive candidates for structural materials in advanced nuclear-power systems due to their good swelling resistance. Four kinds of steels, F82 H, 15 Cr-ODS, SIMP and T91, are investigated in this study. We take 6.4 Me V Fe3+ ions and energy-degraded 1.0 Me V He+ ions in the irradiation of these materials to 5 dpa and 60 appm He/dpa, 200 appm He/dpa and 600 appm He/dpa at 300℃ and 450℃, respectively. The bubble formation and distribution are investigated by transmission electron microscopy(TEM). Formation and distribution of the bubbles in the four investigated steels are compared. The influence of irradiation temperature and helium injection ratio on bubble formation is discussed. It is found that there appears to be homogenously distributed bubbles at 300℃ irradiation while heterogeneously distributed bubbles at 450℃ irradiation.

关键词： martensitic steels Fe and He co-irradiation He bubbles transmission electron microscopy

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

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Chinese Physics B 2021年第5期30卷 81-86页

作者： Zhen Yang Junyuan Yang Qing Liao Shuai Xu Bingsheng Li Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China State Key Laboratory for Environment-Friendly Energy Materials Southwest University of Science and TechnologyMianyang 621010China

SIMP steel is newly developed fully martensitic steel for lead-cooled fast reactors and accelerator-driven *** is important to evaluate its radiation resistance via high flux neutron irradiation,where dense He atoms can be formed via(n,α)transmutation ***-irradiation with Fe and He ions,instead of neutron,was *** were irradiated with 6.4-MeV Fe ions to the damage dose of 5 dpa at a depth of 600 *** 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 *** different irradiation temperatures of 300℃and 450℃were carried *** effect of helium concentration on the microstructure of Fe-irradiated SIMP steel was *** damage was observed using transmission electron *** formed dislocation loops and bubbles depended on the helium injection ratio and irradiation *** of dislocation loops and helium bubbles were homogeneously distributed at 300℃,but not at 450℃.The causes of observed effects are discussed.

关键词： martensitic steels Fe and He co-irradiation microstructure transmission electron microscopy

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