V-Cr-Ti alloys with reduced Ti contents are expected to be good candidates as recyclable structural materials for fusion reactors. Herein, He irradiation was applied to V-4Cr-xTi (x = 0 to 4) alloys to investigate the additional effect of Ti and gas interstitial impurities on their microstructural evolution and irradiation hardening. Following He irradiation of the specimens at 700 °C with a maximum damage depth of 0.5 dpa, transmission electron microscopy and nanoindentation hardness tests were conducted. The microstructural evolution of the titanium-oxycarbonitride (Ti(CON)) precipitates formed during He ion irradiation was observed. The behavior of irradiation hardening is explained by the formation process of Ti(CON) precipitates and the magnitude of irradiation hardening depends on the amount of gas interstitial impurities that contribute to precipitate formation.

中文翻译：

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700 °C 低 Ti 添加量 He 辐照 V-Cr-Ti 合金的显微组织变化

Ti含量降低的V-Cr-Ti合金有望成为聚变反应堆可回收结构材料的良好候选者。在此，将 He 辐照应用于 V-4Cr-xTi（x = 0 至 4）合金，以研究 Ti 和气体间隙杂质对其微观结构演变和辐照硬化的附加影响。在 700 °C 下以 0.5 dpa 的最大损伤深度对样品进行 He 辐照后，进行了透射电子显微镜和纳米压痕硬度测试。观察了 He 离子辐照期间形成的碳氮氧化钛 (Ti(CON)) 沉淀物的微观结构演变。辐照硬化的行为可以通过 Ti(CON) 沉淀物的形成过程来解释，并且辐照硬化的程度取决于有助于沉淀物形成的气体间隙杂质的量。