Stability of the structure and properties of an ultrafine-grained Cr-Ni steel irradiated with neutrons in nuclear reactor core conditions

V. K. Shamardin, M. M. Abramova, T. M. Bulanova, A. A. Karsakov, A. E. Fedoseev, A. V. Obukhov, R. Z. Valiev, I. V. Alexandrov, G. I. Raab, N. A. Enikeev

Результат исследований: Научные публикации в периодических изданияхстатья

6 Цитирования (Scopus)

Аннотация

An ultrafine-grained (UFG) austenite Cr-Ni stainless steel was produced by equal-channel angular pressing. The UFG samples were irradiated in a research nuclear reactor up to damaging doses of 12 and 15 dpa at 350 °C and 450 °C, respectively. The post-irradiation examination featured in this work covers microstructural and mechanical property changes at test temperatures of 20–650 °C. Microstructural studies showed that the concentration of Frank loops was considerably lower in the UFG steel compared to in the coarse-grained material. It was also found that irradiation resulted in precipitation of α-phase in triple junctions of the UFG steel. The post-irradiation examination of mechanical properties testified that the UFG steel exhibited lower irradiation hardening and higher strength compared to the coarse-grained material in the entire testing temperatures range, and improved ductility when tested at 500–650 °C. In summary, we testified that microstructure refinement of an austenite stainless steel down to UFG scale led to enhancement of its resistance to neutron irradiation at elevated temperatures.

Язык оригиналаанглийский
Страницы (с-по)365-372
Число страниц8
ЖурналMaterials Science and Engineering A
Том712
DOI
СостояниеОпубликовано - 18 янв 2018

Предметные области Scopus

  • Физика конденсатов
  • Сопротивление материалов
  • Общее машиностроение
  • Материаловедение (все)

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