Stress evolution in NiCoFeCrMn and NiCoFeCr high-entropy alloys irradiated by helium and krypton ions

M.M. Belov, I.A. Ivanov, В.В. Углов, S.V. Zlotski, Ke Jin, N. A. Stepanjuk, Azamat E. Ryskulov, Artem L. Kozlovskiy, Mikhail V. Koloberdin, Alisher E. Kurakhmedov

1 more author

A. D. Sapar

2022

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DOI 10.56761/efre2022.c5-p-052802

Data confidence 70 medium

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Abstract

The paper presents the results of coarse-grained (80 and 100 μm) bulk high-entropy alloys CoCrFeNi and CoCrFeMnNi samples with X-ray diffraction method in non-irradiated and ion irradiated states (He2+, 40 keV, 2×1017 cm-2and Kr14+, 280 keV, 5×1015 cm-2). It is shown, that irradiation causes compressive macrostress development, especially in regions of maximum damage dose and maximum implanted particles concentration. Also helium ion irradiation causes dislocation density increase in irradiated region, and krypton irradiation tends to decrease dislocation density in the area of maximum damage. As observed, more complex CoCrFeMnNi alloys is more resistant to defect formation than more simple CoCrFeNi.