Thermal grain boundary grooves formation in tungsten under recrystallization

• Дата: 2017
• Автори: Belyaeva, A.I., Galuza, A.A., Kolenov, I.V., Savchenko, A.A.
• Формат: Стаття
• Мова: English
• Опубліковано: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2017
• Назва видання: Вопросы атомной науки и техники
• Теми: Физика радиационных повреждений и явлений в твердых телах
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/134112
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Thermal grain boundary grooves formation in tungsten under recrystallization / A.I. Belyaeva, A.A. Galuza, I.V. Kolenov, A.A. Savchenko // Вопросы атомной науки и техники. — 2017. — № 2. — С. 51-57. — Бібліогр.: 18 назв. — англ.

Tungsten has been chosen as the main candidate for plasma facing components (PFCs) due to its superior properties under extreme operating conditions in future nuclear fusion reactors such as ITER and DEMO. One of the serious issues for PFCs is the high heat load during transient events and disruption in the reactor. Recrystallization and grain size growth in PFC materials are undesirable changes in the materials, since the microstructure developed after recrystallization exhibits a lower mechanical strength and an increased surface roughening. The current work was focused on careful investigation of the thermal grooving at grain boundaries (GB) in tungsten surface under recrystallization (W-rс). Topography of GB thermal grooves in W-rc is studied by atomic force microscopy (AFM). The peculiarities of its profile formation and the main factors which effect on the profile of GB grooving were determined. It is the purpose of this paper to point out these factors. The nature of GB grooving was determined.