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- 2022
Evolution of structure of AlCoCrFeNi high-entropy alloy on irradiation by pulsed electron beam
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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Дата начала обработки статистических данных - 27 января 2016 г.