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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.

Acknowledgments: 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

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Article reference

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://eng.dream-journal.org/issues/content/article_388.html
(accessed: 06/22/2024).

 

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