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

作　　者：方雪松 申铁龙 崔明焕 金鹏 李炳生 朱亚滨 王志光 

机构地区：[1]Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000 [2]University of Chinese Academy of Sciences,Beijing 100049

出　　处：《Chinese Physics Letters》2017年第11期57-60,共4页中国物理快报（英文版）

基　　金：Supported by the Young Scientists Fund of the National Natural Science Foundation of China under Grant No 11505246;the Major Research Plan of the National Natural Science Foundation of China under Grant No 91426301

摘　　要：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℃ and i dpa, at 400℃. MicrostructurM changes are investigated in detail by transmission electron microscopy with cross-section technique. Interstitial defects and defect dusters induced by Fe-ion irradiation are observed in ali 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.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℃ and i dpa, at 400℃. MicrostructurM changes are investigated in detail by transmission electron microscopy with cross-section technique. Interstitial defects and defect dusters induced by Fe-ion irradiation are observed in ali 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.

关 键 词：Characterization of Microstructure and Stability of Precipitation in SIMP Steel Irradiated with Energetic Fe Ions FE 

分 类 号：TG142.1[一般工业技术—材料科学与工程]