1. Correlation between Microstructural Change and Irradiation Hardening Behavior of He-Irradiated V–Cr–Ti Alloys with Low Ti Addition
- Author
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Ken-ichi Fukumoto, Shuichiro Miura, Takuya Nagasaka, Ryoya Ishigami, and Yoshiki Kitamura
- Subjects
focused ion beam ,Technology ,Nuclear and High Energy Physics ,Materials science ,genetic structures ,Alloy ,Analytical chemistry ,Vanadium ,chemistry.chemical_element ,Atom probe ,engineering.material ,law.invention ,irradiation hardening ,Impurity ,law ,transmission electron microscopy ,Irradiation ,Ti(CON) precipitate ,Precipitation (chemistry) ,technology, industry, and agriculture ,vanadium alloy ,equipment and supplies ,Atomic and Molecular Physics, and Optics ,TK1-9971 ,atom probe tomography ,chemistry ,Transmission electron microscopy ,Hardening (metallurgy) ,engineering ,Electrical engineering. Electronics. Nuclear engineering - Abstract
V–4Cr–xTi (x = 0 to 4) alloys were used to investigate the additional effect of Cr, Ti and interstitial impurities on the microstructural evolution in He-irradiated V–Cr–Ti alloys to minimize radioactivity after fusion neutron irradiation. Transmission electron microscopy and atom probe tomography were carried out to the He-irradiated specimens at 500 °C with 0.5 dpa at peak damage. A flash electro-polishing method for the FIB-extracted specimen was established for the ion-irradiated vanadium alloys. The microstructural evolution of the irradiation-induced titanium-oxycarbonitride, Ti(CON) precipitates was observed and was influenced by the effect of Ti addition on the Ti(CON) precipitation. Apparent Ti(CON) precipitates formed in V-4Cr-xTi with 2% addition of Ti. In the V-4Cr-1Ti alloy, a high density Ti enriched cluster was formed. The origin of the irradiation hardening increase resulted from the size distribution of Ti(CON) precipitation from the dispersed barrier-hardening theory.
- Published
- 2021
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