Microstructure Evolution of Reactor Pressure Vessel A508-3 Steel under High-Dose Heavy Ion Irradiation
Source abstract
Abstract
The microstructure evolution of nuclear reactor pressure vessel A508-3 steel irradiated by heavy ions up to 1.5 dpa was studied by transmission electron microscopy (TEM). According to the TEM analysis, black dots were widely distributed in the irradiated A508-3 steel, with a high density of 1.782 × 1022/m3. A large number of dislocations with Burgers vectors <100> were formed in the irradiated A508-3 steel and tangled together, leading to the formation of dislocation networks. The number density of black dots at 1.5 dpa was 3.5 times higher than that at 0.08 dpa, and the corresponding average size showed an 8% increase. The higher density of dislocation defects led to a significant increase in hardness from 3.0 GPa at 0.08 dpa to 4.2 GPa at 1.5 dpa. The elastic modulus showed a slight increase and less dependence on the irradiation dose.
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Research context
OpenAlex topics: Fusion materials and technologies · Ion-surface interactions and analysis · Microstructure and mechanical properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
Funding
Guangdong Major Project of Basic and Applied Basic Research · National Natural Science Foundation of China · International Science and Technology Cooperation Program of Guangdong Province · Zhuhai–Hong Kong–Macao Science and Technology Cooperation Program of Zhuhai City, China · Key Research Project of Guangdong Province · Fundamental Research Funds for the Central Universities, Sun Yat-sen University · Science and Technology on Reactor Fuel and Materials Laboratory, Nuclear Power Institute of China
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