S. E. Danilov
FORMATION OF INTERMETALLIC PARTICLES IN AN Fe-Ni-Al ALLOY DURING ANNEALING AND ELECTRON IRRADIATION
DOI: 10.17804/2410-9908.2022.6.107-116 The behavior of intermetallic nanoparticles, such as Ni3Al, and vacancy defects in an fcc Fe-Ni-Al alloy during annealing and electron irradiation is studied by measuring residual resistivity. It is shown that, during annealing at early stages, Ni3Al zones are formed in the quenched Fe-Ni-Al alloy, which increase residual electrical resistance, and during annealing above 700 K, nanosized (~4.5 nm) intermetallic precipitates are formed from them, uniformly distributed in the alloy matrix, whose growth leads to a decrease in residual resistivity. Under irradiation at room temperature, vacancy defects accumulate in the alloy in the form of vacancy complexes. The dissociation of these complexes at about 400 K causes the appearance of freely migrating vacancies and enhances self-diffusion forming Ni3Al bands. At about 600 to 700 K, the solid solution is decomposed thermally. At higher temperatures, the formation of intermetallic particles occurs, which is characterized by a decrease in electrical resistance.
Acknowledgements: The research was performed under the state assignment, theme Function, No. 122021000035-6. Keywords: irradiation, electrons, electrical resistivity, Fe-Ni-Al alloy, intermetallic compounds, point defect sinks, solid solution decomposition Bibliography:
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С. Е. Данилов
ОБРАЗОВАНИЕ ИНТЕРМЕТАЛЛИДНЫХ ЧАСТИЦ В СПЛАВЕ Fe-Ni-Al ПРИ ОТЖИГЕ И ОБЛУЧЕНИИ ЭЛЕКТРОНАМИ
Методом измерения остаточного электрического сопротивления исследовано поведение интерметаллидных наночастиц типа Ni3Al и вакансионных дефектов в ГЦК-сплаве Fe-Ni-Al при отжигах и при электронном облучении. Было показано, что в закаленном сплаве Fe-Ni-Al при отжиге на ранних этапах происходит образование зон состава Ni3Al, повышающих остаточное электросопротивление, а при отжигах выше 700 К из них образуются наноразмерные (~4,5 нм) интерметаллидные выделения, равномерно распределенные в матрице сплава, рост которых приводит к уменьшению остаточного сопротивления. При облучении в районе комнатных температур происходит накопление вакансионных дефектов в виде вакансионных комплексов. Диссоциация этих комплексов в районе 400 К приводит к появлению свободно мигрирующих вакансий и усилению самодиффузии, приводящей к образованию зон состава Ni3Al. В районе 600–700 К процесс распада твердого раствора происходит термически. При более высоких температурах происходит формирование интерметаллидных частиц, характеризующееся спадом электросопротивления.
Благодарности: Исследование выполнено в рамках государственного задания Минобрнауки России (тема «Функция» Г.р. № 122021000035-6). Ключевые слова: облучение, электроны, электросопротивление, сплав Fe-Ni-Al, интерметаллиды, стоки то-чечных дефектов, распад твердого раствора Библиография:
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- Dimitrov C., Dimitrov O., Dworschak F. The interaction of self interstitials with undersized solute atoms in electron-irradiated aluminium // Journal of Physics F: Metal Physics. – 1978. – 8. – P. 1031–1052. – DOI: 10.1088/0305-4608/8/6/009.
- Ardell A. J. & Nicholson R. B. On the modulated structure of aged Ni-Al alloys // Acta Metall. – 1966. – 14 (10). – P. 1295–309.
- An intermetallic forming steel under radiation for nuclear applications / C. Hofer, E. Stergar, S. A. Maley, Y. Q. Wang, P. Hosemann // J. Nucl. Mater. – 2015. – 458. – P. 361–368. – DOI: 10.1016/j.jnucmat.2014.12.099.
Библиографическая ссылка на статью
Danilov S. E. Formation of Intermetallic Particles in An Fe-Ni-Al Alloy During Annealing and Electron Irradiation // Diagnostics, Resource and Mechanics of materials and structures. -
2022. - Iss. 6. - P. 107-116. - DOI: 10.17804/2410-9908.2022.6.107-116. -
URL: http://dream-journal.org/issues/2022-6/2022-6_388.html (accessed: 06.10.2024).
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