Characterization of Microstructure and Stability of Precipitation in SIMP Steel Irradiated with Energetic Fe Ions

A type of home-made reduced activation martensitic steel, high silicon(SIMP) steel, is homogeneously irradiated with energetic Fe ions to the doses of 0.1, 0.25 and 1 displacement per atom(dpa), respectively, at 300°C and1 dpa, at 400℃. Microstructural changes are investigated in detail by transmiss...

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Published in中国物理快报：英文版 no. 11; pp. 61 - 64
Main Author 方雪松 申铁龙 崔明焕 金鹏 李炳生 朱亚滨 王志光
Format Journal Article
LanguageEnglish
Published 2017
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ISSN0256-307X
1741-3540

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Summary:A type of home-made reduced activation martensitic steel, high silicon(SIMP) steel, is homogeneously irradiated with energetic Fe ions to the doses of 0.1, 0.25 and 1 displacement per atom(dpa), respectively, at 300°C and1 dpa, at 400℃. Microstructural changes are investigated in detail by transmission electron microscopy with cross-section technique. Interstitial defects and defect clusters induced by Fe-ion irradiation are observed in all the specimens under different conditions. It is found that with increasing irradiation temperature, size of defect clusters increases while the density drops quickly. The results of element chemical mapping from the STEM images indicate that the Si element enrichment and Ta element depletion occur inside the precipitates in the matrix of SIMP steel irradiated to a dose of 1 dpa at 300℃. Correlations between the microstructure and irradiation conditions are briefly discussed.
Bibliography:Xue-Song Fang;Tie-Long Shen;Ming-Huan Cui;Peng Jin;Bing-Sheng Li;Ya-Bin Zhu;Zhi-Guang Wang;Institute of Modern Physics, Chinese Academy of Sciences;University of Chinese Academy of Sciences
11-1959/O4
ISSN:0256-307X
1741-3540