TEM Characterization of D, He, Ne Ion Irradiation Damage of 15-15Ti Austenitic Stainless Steel
AN Zhan1, XU Chi2,*, GONG Aoxiang1, TONG Zhenfeng1,*
1 School of Nuclear Science and Engineering, North China Electric Power University, Beijing 102206, China 2 Key Laboratory of Beam Technology of the Ministry of Education, School of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China
Abstract: 15-15Ti austenitic stainless steel is one of the candidate materials for commercial fast reactor cladding materials due to its excellent mechanical properties, high temperature stability, corrosion resistance and radiation resistance. At present, there are still few studies on the irradiation damage of 15-15Ti austenitic stainless steel, and the irradiation experiment mostly uses a lower irradiation dose, the experimental data corresponding to the extremely high irradiation dose in the commercial fast reactor are even more lacking. In order to explore the effect of extremely high irradiation dose on the irradiation damage of 15-15Ti austenitic stainless steel in commercial fast reactor, the experimental data supplement for the irradiation resistance of 15-15Ti austenitic stainless steel was provided, the samples were irradiated with D+, He+ and Ne+ by using transmission electron microscopy and nano-indentation techniques. The microstructure of irradiated samples was characterized by TEM, and the size and density of irradiation defects such as dislocation loops and bubbles were statistically analyzed. The results show that with the increase of irradiation dose, the size of dislocation loops and voids increases obviously, and the number density decreases. There is obvious void accumulation near the boundary between grain boundary and precipitate, and obvious irradiation hardening phenomenon.
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2025, Vol. 39 
