Mechanical properties of neutron-irradiated vanadium alloys in a liquid-sodium environment
| Autor: | Hitoshi Kuroiwa, Hideki Matsui, Minoru Narui, Ken-ichi Fukumoto, Xu Qiu |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Hydrogen Transition temperature Alloy Metallurgy technology industry and agriculture chemistry.chemical_element Vanadium engineering.material equipment and supplies Nuclear Energy and Engineering chemistry engineering Hardening (metallurgy) General Materials Science Irradiation Ductility Titanium |
| Zdroj: | Journal of Nuclear Materials. :594-597 |
| ISSN: | 0022-3115 |
| DOI: | 10.1016/j.jnucmat.2008.12.185 |
| Popis: | Vanadium alloys, including the highly purified V-4Cr-4Ti alloy called NIFS-Heat2, in the form of sodium-enclosed irradiation capsules, were irradiated up to a damage level of 5 dpa in the Joyo reactor at temperatures from 395 to 601 °C. An increase of the ductile – brittle transition temperature (DBTT) by neutron irradiation and irradiation hardening were observed. No significant loss of ductility was observed even for irradiation at 395 and 450 °C. The addition of titanium to V-Cr alloys was effective for irradiation hardening at high temperature. Hydrogen uptake in the cleaning process during dismantling of the irradiation capsules caused ductility loss of the highly purified V-4Cr-4Ti alloys; the alloys recovered their ductility when they were annealed at 400 °C in vacuum. The uniform formation of Ti(OCN) precipitate was suppressed in highly purified V-4Cr-4Ti alloys irradiated in Joyo in a liquid-sodium environment. |
| Databáze: | OpenAIRE |
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