nucВестник НЯЦ РКNNC RK Bulletin1729-75161729-7885Национальный ядерный центр Республики Казахстан10.52676/1729-7885-2026-1-51-60nuc-943Research ArticleСтатьиВЛИЯНИЕ НЕЙТРОННОГО ОБЛУЧЕНИЯ НА МЕХАНИЧЕСКИЕ СВОЙСТВА СТАЛИ 316LN В ЛИТОМ И ХОЛОДНОКАТАНОМ СОСТОЯНИЯХEFFECT OF NEUTRON IRRADIATION ON MECHANICAL PROPERTIES OF 316LN STEEL IN CAST AND COLD ROLLED CONDITIONShttps://orcid.org/0000-0002-5885-6464МережкоД. А.MerezhkoD. A.

Старший научный сотрудник отдела радиационной физики твердого тела ИЯФ, кандидат физико-математических наук

Алматы

Almaty

diana@inp.kzhttps://orcid.org/0000-0001-5967-8121ТакиеваА. М.TakiyevaA. M.

Инженер лаборатории радиационного материаловедения

Алматы

Almaty

takijeva@inp.kzhttps://orcid.org/0000-0002-8727-4404МережкоМ. С.MerezhkoM. S.

Заведующий лабораторией радиационного материаловедения, PhD

Алматы

Almaty

merezhko@inp.kzРГП «Институт ядерной физики» Агентства РК по атомной энергииКазахстанRSE “Institute of Nuclear Physics” of the Agency of the RK for Atomic EnergyKazakhstan202625042026015160Copyright © Мережко Д.А., Такиева А.М., Мережко М.С., 20262026Мережко Д.А., Такиева А.М., Мережко М.С.Merezhko D.A., Takiyeva A.M., Merezhko M.S.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://journals.nnc.kz/jour/article/view/943

Исследованы механические свойства сталей AISI 316LN и модификаций 211L–213L в литом и холоднокатаном состояниях, а также после нейтронного облучения до 2·1019 н/см2 методами Shear Punch и Small Punch. Показано, что модифицированные стали превосходят 316LN по прочности, наилучшее сочетание свойств имеет сталь 211L. Снижение прочности литых сталей в 2–3 раза связано с крупным зерном и литейными дефектами. Облучение нейтронами вызывает значительное упрочнение литых сталей за счёт радиационных дефектов, тогда как в холоднокатаных структурах наблюдается релаксация напряжений. Микроструктурный анализ выявил различия в механизмах деформации и разрушения между литым и холоднокатаным состояниями.

The mechanical properties of AISI 316LN steel and its 211L–213L modifications were investigated in both cast and cold- rolled conditions, as well as after neutron irradiation up to a fluence of 2·1019 n/cm2, using the Shear Punch and Small Punch testing methods. The results showed that the modified steels exhibited higher strength compared to 316LN, with 211L demonstrating the most favorable combination of properties. The 2–3-fold reduction in the strength of cast steels was attributed to coarse grain size and casting defects. Neutron irradiation led to significant hardening of cast steels due to the formation of radiation-induced defects, whereas stress relaxation was observed in cold-rolled structures. Microstructural analysis revealed distinct differences in the deformation and fracture mechanisms between the cast and cold-rolled conditions.

азотистые сталинейтронное облучениелегированиеShear punchмеханические свойстваnitrogen steelsneutron irradiationalloyingshear punch testmechanical propertiesАвторы выражают благодарность Министерству науки Республики Казахстан за финансовую поддержку данного исследования, оказанную в рамках проекта BR24992891 «Комплексные исследования по ядерной, радиационной физике и технике, физике высоких энергий и космологии для развития конкурентных технологий». Также авторы признательны М.Н. Гусеву (Oak Ridge National Laboratory) за предоставленные для работы материалы.ReferencesWas G.S. Fundamentals of Radiation Materials Science. – New York, NY: Springer, 2017. ISBN 978-3-540-49471-3Was G.S. Fundamentals of Radiation Materials Science. – New York, NY: Springer, 2017. 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