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Correlation between Microstructural Change and Irradiation Hardening Behavior of He-Irradiated V–Cr–Ti Alloys with Low Ti Addition

机译:低Ti加法微结构变化与辐射硬化行为的相关性

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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.
机译:V-4CR-XTI(X = 0至4)合金用于研究Cr,Ti和间质杂质对He-辐照的V-Cr-Ti合金的微观结构演化的额外效果,以最小化熔融中子辐射后放射性的放射性。透射电子显微镜和原子探测层析成像在500℃下以0.5dPa损坏,在500℃下进行探测标本。为离子照射钒合金建立了用于FIB提取的样品的闪光电抛光方法。观察到辐照氧化钛 - 氧氮化物,Ti(CON)沉淀物的微观结构演化,受Ti添加对Ti(Con)沉淀的影响的影响。在V-4Cr-XTI中形成明显的Ti(CON)沉淀物,其加入2%的Ti。在V-4CR-1TI合金中,形成高密度Ti富集簇。照射硬化的起源增加,从分散的屏障 - 硬化理论中的Ti(Con)沉淀的尺寸分布引起。

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