Erosion properties of tungsten and WTa5 alloy exposed to repetitive QSPA plasma loads below melting threshold

• Дата: 2018
• Автори: Makhlai, V.A., Herashchenko, S.S., Aksenov, N.N., Byrka, O.V., Garkusha, I.E., Malykhin, S.V., Surovitskiy, S.V., Kulik, N.V., Staltsov, V.V., Lebedev, S.I., Shevchuk, P.B., Wirtz, M., Sadowski, M.J.
• Формат: Стаття
• Мова: English
• Опубліковано: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2018
• Назва видання: Вопросы атомной науки и техники
• Теми: ИТЭР и приложения для термоядерного реактора
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/148819
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Erosion properties of tungsten and WTa5 alloy exposed to repetitive QSPA plasma loads below melting threshold / V.A. Makhlai, S.S. Herashchenko, N.N. Aksenov, O.V. Byrka, I.E. Garkusha, S.V. Malykhin, S.V. Surovitskiy, N.V. Kulik, V.V. Staltsov, S.I. Lebedev, P.B. Shevchuk,M. Wirtz, M.J. Sadowski // Вопросы атомной науки и техники. — 2018. — № 6. — С. 59-62. — Бібліогр.: 15 назв. — англ.

The damage of deformed double forged pure tungsten (W) and tungsten alloyed with 5 wt.% tantalum (WTa5) have been studied in experimental simulations of ITER-like transient events (surface heat load of 0.45 MJ/m² and the pulse duration of 0.25 ms) with quasi-stationary plasma accelerator QSPA Kh-50. The plasma exposures were performed for targets maintained at room temperature and preheated at 200 or 300°C. The large and fine cracks appeared in result of plasma impacts. The high number of repetitive plasma loads below the melting threshold led to the clear degradation of thermo-mechanical properties of the affected surface layers on tungsten. Comparative analysis of the cracks propagation to the bulk is presented for both W and WTa5 samples.