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Full-Text Articles in Metallurgy
Kinetics And Phase Stability Of Nano-Scale Precipitates In Fe-Based Binary Alloys During Ion Irradiations, Yajie Zhao
Kinetics And Phase Stability Of Nano-Scale Precipitates In Fe-Based Binary Alloys During Ion Irradiations, Yajie Zhao
Doctoral Dissertations
Due to the high void-swelling resistance and good mechanical, thermal and chemical properties, FeCr based ferritic-martensitic steels are promising structural materials in future nuclear reactors. However, they suffer from the well-known “475 °C embrittlement” phenomenon due to formation of Cr-rich alpha prime (α’) precipitates. Despite the extensive observation of α’ after neutron irradiations, α’ formation was seldom reported after high dose rate ion irradiations.
In this study, high purity FeCr alloys with Cr concentrations of 5-18% were irradiated by 8 MeV Fe ions at -123 °C to 450 °C, 10-5 – 10-3 dpa/s to mid-range doses of 0.37-3.7 …