Monolayer-thick TiO precipitation in V-4Cr-4Ti alloy induced by proton irradiation

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• 作者：A. Impagnatiello^a ; ^b ; ^{andrea.impagnatiello@postgrad.manchester.ac.uk} ; S.M. Shubeita^b ; P.T. Wady^b ; I. Ipatova^a ; ^b ; H. Dawson^a ; C. Barcellini^a ; ^b ; E. Jimenez-Melero^a ; ^b
• 关键词：Refractory metal ; Precipitation ; Lattice defects ; High-resolution electron microscopy ; Nuclear fusion reactor
• 刊名：Scripta Materialia
• 出版年：2017
• 出版时间：15 March 2017
• 年：2017
• 卷：130
• 期：Complete
• 页码：174-177
• 全文大小：917 K
• 卷排序：130

文摘

We have characterised to atomic resolution the mono-layer thick TiO-type precipitate induced by proton irradiation in V-4Cr-4Ti alloy at a dose of 0.3 dpa and a temperature of 350 °C. Its formation coincides with the coarsening radiation-induced interstitial a/2〈111〉 dislocation loops that are already present at 300 °C. The dislocation network induced by prior cold work is mostly recovered at 300 °C and 0.3 dpa, and is therefore expected to exert a minimal effect on the precipitate formation. This monolayer-thick precipitate constitutes an early stage in the radiation-induced aging process of V-4Cr-4Ti at low temperatures, and can potentially absorb additional light elements in reactor environments.