Comparative study of irradiation resistance for multicomponent concentrated HfNbTiZr and dilute V-4Cr-4Ti alloys irradiated with He ions
Safronov I.V. Ivanov I.A. Jin K. Uglov V.V. Zlotski S.V. Belov M.M. Chen S. Zhang Q. Kurakhmedov A.E. Amanzhulov B.S. Ryskulov A.E. Sapar A.D. Temir A.M. Mukhamadiyev S.A. Ungarbayev Y.O. Remnev G.E.
December 2024Elsevier B.V.
Materialia
2024#38
To clarify the efficiency of irradiation resistance, investigation of body-centered cubic concentrated HfNbTiZr and dilute V-4Cr-4Ti alloys, irradiated by 40 keV He ions up to 5 × 1016, 1 × 1017 and 5 × 1017 cm–2 fluences at room temperature, was carried out. Similar to V-4Cr-4Ti, HfNbTiZr possesses high phase stability and surface erosion resistance to irradiation with He ions up to 5 × 1017 cm-2. Using transmission electron microscopy, a more than 2-fold increase in overall swelling, as well as its intensification with increasing fluence was observed for HfNbTiZr compared to V-4Cr-4Ti. Combining atomistic calculations and simulations based on the Modified Embedded Atom Method interatomic potential and Density Functional Theory, the energetics of defects and helium-vacancy complexes, as well as their dynamics, were studied for alloys. It was shown that in the HfNbTiZr and dilute vanadium alloys the number of radiation-induced vacancies (v) can be comparable. According to the binding energy curves, there is a tendency for higher He accumulation in helium-vacancy complexes due to the increased He/v ratio in HfNbTiZr compared to V-4Cr-4Ti (∼1.5 versus ∼1.1). It was found that the kick-out of lattice atoms is enhanced in HfNbTiZr and is suppressed in V-4Cr-4Ti. Therefore, the more intense He bubble growth in HfNbTiZr may be due to the kick-out mechanism, which leads to a decrease in the He/v ratio and stimulates helium-vacancy complexes to trap additional He atoms. Our results can be used to improve the bubble swelling resistance in the design of new multicomponent concentrated alloys.
Binding energy , Bubble growth , Defect energetics , He diffusion , Helium-vacancy complex , Refractory high-entropy alloy
Text of the article Перейти на текст статьи
Belarusian State University, Minsk, 220030, Belarus
Institute of Nuclear Physics, Almaty, 050032, Kazakhstan
Department of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
Advance Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing, 100081, China
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, 115409, Russian Federation
Tomsk Polytechnic University, Tomsk, 634050, Russian Federation
Belarusian State University
Institute of Nuclear Physics
Department of Materials Science and Engineering
Advance Research Institute of Multidisciplinary Science
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Tomsk Polytechnic University
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026