Nuclear Engineering and Technology

  • 제52권8호
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  • Pages.1749-1755
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  • 2020
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  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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Defects evolution and element segregation of Ni-Mo-Cr alloy irradiated by 30 keV Ar ions

  • Liu, Min (Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University) ;
  • Liu, Wenguan (Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University) ;
  • He, Xiujie (Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University) ;
  • Gao, Yantao (Shanghai Institute of Applied Physics, Chinese Academy of Sciences) ;
  • Liu, Renduo (Shanghai Institute of Applied Physics, Chinese Academy of Sciences) ;
  • Zhou, Xingtai (Shanghai Institute of Applied Physics, Chinese Academy of Sciences)
  • 투고 : 2019.11.07
  • 심사 : 2020.01.19
  • 발행 : 2020.08.25
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초록

In present study, TEM foils of Ni-Mo-Cr alloy were directly irradiated with 30 keV Ar ions to allow direct characterization. The defects evolution and element segregation after irradiation were investigated by TEM and HAADF-EDS linear scanning. At low irradiation doses (1.38 and 2.76 dpa), black dots were formed and grew with increasing dose. Complicated defects including peas-shaped dislocation loops, polygon dislocation networks and large loops were visible in samples irradiated to high doses (13.8 and 27.6 dpa). Meanwhile, dislocation channels appeared, in which defects were swept out. Significant Mo depletions at dislocation lines and grain boundaries were induced by irradiation due to large misfits between Mo-Ni atoms and high content of Mo.

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