Swellling of advanced austenitic stainless steels developed for the environment of heavy neutron exposure
| Autor: | Shigeharu Ukai, S. Onose, N. Akasaka, Itaru Shibahara, Hirokazu Okada |
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| Rok vydání: | 1994 |
| Předmět: |
inorganic chemicals
Austenite Nuclear and High Energy Physics Materials science Silicon Phosphide Metallurgy technology industry and agriculture chemistry.chemical_element Microstructure Neutron temperature chemistry.chemical_compound Nickel Nuclear Energy and Engineering chemistry medicine General Materials Science Irradiation Swelling medicine.symptom |
| Zdroj: | Journal of Nuclear Materials. :487-491 |
| ISSN: | 0022-3115 |
| DOI: | 10.1016/0022-3115(94)90109-0 |
| Popis: | Modified Type-316 and higher-nickel advanced austenitic steels were irradiated in the FFTF and JOYO fast reactors to a neutron dose as high as 210 dpa. At temperatures greater than 500°C, P-, Si-, and Ti-bearing cold-worked austenitic steels showed significant swelling suppression even after 150 dpa. The dominant mechanism is associated with formation of stable phosphide precipitated by addition of Ti and/or increased Si. In the lower-temperature regime, where the phosphide precipitate is not present, silicon acts to suppress swelling at contents of about 0.8 wt%. Only at this higher silicon level, increased amounts of nickel reduced the swelling. At 0.5 wt% silicon, the swelling was insensitive to the alloying elements, such as Ni, Ti and P. The effect of Si and Ni could be explained by their influence on void nucleation through effects on effective vacancy diffusion coefficient. Further improvement in swelling was expected by increasing the nickel and possibly the phosphorus contents of the advanced austenitics. |
| Databáze: | OpenAIRE |
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