Evolution of structure of AlCoCrFeNi high-entropy alloy on irradiation by pulsed electron beam
Ivanov Yu. F.1, Gromov V. E.2, Konovalov S. V.3, Shliarova Y. А.2
1Institute of High Current Electronics, Siberian Branch, Russian Academy of Sciences, Tomsk, Russia
2Siberian State Industrial University, Novokuznetsk, Russia
3Samara National Research University, Samara, Russia
Email: ksv@ssau.ru

By the methods of modern physical materials science the change in structural-phase state of AlCoCrFeNi high-entropy alloy (HEA) of nonequiatomic composition obtained by the methods of wire arc additive technology (WAAM) after irradiation by electron beams with energy density of 10-30 J/cm2, durality of 50 μs, frequency 0.3 s-1 is studied. In the initial state the alloy had a dendritic structure indicating the inhomogeneous distribution of elements. It is shown that electron beam processing forms the structure of high-velocity cellular crystallization with cell size of 100-200 nm, along boundaries of which the nanodimensional (15-30 nm) inclusions of the second phase enriched in Cr and Fe atoms are located. Keywords: High-entropy alloy, electron beam processing, structure, phase composition.
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