| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Characterization of Microstructure and Stability of Precipitation in SIMP Steel Irradiated with Energetic Fe Ions |
| Xue-Song Fang1,2, Tie-Long Shen1**, Ming-Huan Cui1, Peng Jin1,2, Bing-Sheng Li1, Ya-Bin Zhu1, Zhi-Guang Wang1** |
1Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000
2University of Chinese Academy of Sciences, Beijing 100049
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| Cite this article: |
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Xue-Song Fang, Tie-Long Shen, Ming-Huan Cui et al 2017 Chin. Phys. Lett. 34 116102 |
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Abstract 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$^{\circ}\!$C and 1 dpa, at 400$^{\circ}\!$C. 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$^{\circ}\!$C. Correlations between the microstructure and irradiation conditions are briefly discussed.
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Received: 17 July 2017
Published: 25 October 2017
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| PACS: |
61.72.U-
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(Doping and impurity implantation)
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61.72.J-
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(Point defects and defect clusters)
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61.80.Jh
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(Ion radiation effects)
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68.37.Lp
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(Transmission electron microscopy (TEM))
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68.37.Ma
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(Scanning transmission electron microscopy (STEM))
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| Fund: Supported by the Young Scientists Fund of the National Natural Science Foundation of China under Grant No 11505246, and the Major Research Plan of the National Natural Science Foundation of China under Grant No 91426301. |
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