Neutron Diffraction Studies of Carbide Precipitate Forming in the 0.04c–4cr–18mn–2v Steel under Thermal Aging and Fast-Neutron Irradiation

V. I. Bobrovskii; V. I. Voronin; V. I. Maximov; V. D. Parkhomenko; N. V. Proskurnina; V. V. Sagaradze

doi:10.17804/2410-9908.2024.6.018-034

V. I. Bobrovskii, V. I. Voronin, V. I. Maximov, V. D. Parkhomenko, N. V. Proskurnina, V. V. Sagaradze

NEUTRON DIFFRACTION STUDIES OF CARBIDE PRECIPITATE FORMING IN THE 0.04C–4Cr–18Mn–2V STEEL UNDER THERMAL AGING AND FAST-NEUTRON IRRADIATION

DOI: 10.17804/2410-9908.2024.6.018-034

Aging austenitic steels are characterized by a complex microstructure and various defects and precipitates, which largely determine the properties of steels. The formation and evolution of a system of defects in these materials are accompanied by changes in the Bragg and diffuse neutron scattering spectra. This makes neutron diffraction methods an effective means of studying them. This paper analyzes the results of our neutron diffraction experiments studying the changes in the crystal structure and a system of carbide precipitates in the 0.4C-4Cr-18Mn-2V austenitic manganese steel, which develop in the material under thermal aging and irradiation by fast neutron fluxes. Differences occurring under these effects are revealed. The results of the analysis are in good agreement with the electron microscopic data and supplement them in terms of studying irradiated samples.

Acknowledgement: The research was performed at the IMP Neutron Material Science Complex under the state assignment from the Ministry of Science and Higher Education of the Russian Federation (theme Flux, No. 122021000031-8).

Keywords: neutron diffraction, diffuse scattering, carbide precipitates, aging steels, radiation-induced defects, defect clusters

References:

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В. И. Бобровский, В. И. Воронин, В. И. Максимов, В. Д. Пархоменко, Н. В. Проскурнина, В. В. Сагарадзе

НЕЙТРОНОГРАФИЧЕСКОЕ ИССЛЕДОВАНИЕ ПРОЦЕССОВ ФОРМИРОВАНИЯ КАРБИДНЫХ ПРЕЦИПИТАТОВ В СТАЛИ 40Х4Г18Ф2 ПРИ ТЕРМИЧЕСКОМ СТАРЕНИИ И ОБЛУЧЕНИИ БЫСТРЫМИ НЕЙТРОНАМИ

Стареющие аустенитные стали характеризуются наличием сложной микроструктуры и различных дефектов и преципитатов, в значительной степени определяющих свойства сталей. Формирование и эволюция системы дефектов в этих материалах сопровождаются изменениями в спектрах брэгговского и диффузного рассеяния нейтронов, что делает нейтронно-дифракционные методы эффективным средством их изучения. В данной работе мы выполнили анализ результатов наших нейтронографических экспериментов по исследованию изменений кристаллической структуры и системы карбидных преципитатов в марганцевой аустенитной стали 40Х4Г18Ф2, развивающихся при термическом старении материала и облучении его потоками быстрых нейтронов. Выявлены отличия, которые возникают при таких способах воздействия. Результаты анализа хорошо согласуются с электронно-микроскопическими данными, дополняя их в части исследования облученных образцов.

Благодарность: Результаты исследования получены в рамках государственного задания МИНОБРНАУКИ России (тема «ПОТОК», №122021000031-8), выполнявшегося на базе Уникальной научной установки «Нейтронный материаловедческий комплекс ИФМ».

Ключевые слова: нейтронная дифракция, диффузное рассеяние, карбидные преципитаты, стареющие стали, радиационно-индуцированные дефекты, кластеры дефектов

Библиография:

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Precipitation hardening and radiation damage ability of austenitic stainless steels / V. V. Sagaradze, V. M. Nalesnik, S. S. Lapin, V. M. Alyabyev // Journal of Nuclear Materials. – 1993. – Vol. 202 (1–2). – P. 137–144. – DOI: 10.1016/0022-3115(93)90036-X.
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Peculiarities of radiation-induced processes in the Cr–Ni–Mo austenitic steels studied by neutron diffraction / V. I. Voronin, V. L. Arbuzov, V. I. Bobrovskii, S. E. Danilov, K. A. Kozlov, N. V. Proskurnina, V. V. Sagaradze // Diagnostics, Resource and Mechanics of materials and structures. – 2015. – Iss. 5. – С. 80–89. – DOI: 10.17804/2410-9908.2015.5.080-089. – URL: http://dream-journal.org/issues/2015-5/2015-5_46.html
Evolution of the microstructure and microstresses in the 40Kh4G18F2 steel upon carbide aging / V. V. Sagaradze, B. N. Goshchitskii, E. G. Volkova, V. I. Voronin, I. F. Berger, A. I. Uvarov // Physics of Metals and Metallography. – 2011. – Vol. 111. – P. 80–90. – DOI: 10.1134/S0031918X1101011X.
Initiation of the shape memory effect by fast neutron irradiation / V. I. Bobrovskii, S. V. Afanasyev, V. I. Voronin, V. A. Kazantsev, N. V. Kataeva, V. D. Parkhomenko, N. V. Proskurnina, V. V. Sagaradze // Physics of Metals and Metallography. – 2024. – Vol. 125 (2). – P. 211–216. – DOI: 10.1134/S0031918X23602664.
Martensitic transformations γ–ɛ(α) and the shape-memory effect in aging high-strength manganese austenitic steels / V. V. Sagaradze, V. I. Voronin, Yu. I. Filippov, V. A. Kazantsev, M. L. Mukhin, E. V. Belozerov, N. L. Pecherkina, N. V. Kataeva, A. G. Popov // Physics of Metals and Metallography. – 2008. – Vol. 106 (6). – P. 630–640. – DOI: 10.1134/S0031918X08120120.
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Defects in a lattice of pure nickel subjected to fast-neutron irradiation followed by annealings: neutron-diffraction examination / V. I. Voronin, I. F. Berger, N. V. Proskurnina, B. N. Goschitskii // Physics of Metals and Metallography. – 2016. – Vol. 117. – P. 348–354. – DOI: 10.1134/S0031918X16040141.
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Библиографическая ссылка на статью

Neutron Diffraction Studies of Carbide Precipitate Forming in the 0.04c–4cr–18mn–2v Steel under Thermal Aging and Fast-Neutron Irradiation / V. I. Bobrovskii, V. I. Voronin, V. I. Maximov, V. D. Parkhomenko, N. V. Proskurnina, V. V. Sagaradze // Diagnostics, Resource and Mechanics of materials and structures. - 2024. - Iss. 6. - P. 18-34. -
DOI: 10.17804/2410-9908.2024.6.018-034. -
URL: http://dream-journal.org/issues/content/article_492.html
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