STRUCTURE AND PROPERTIES OF A HIGH-ENTROPY AlCrFeCoNi ALLOY AFTER ELECTRON-ION-PLASMA TREATMENT

V. E. Gromov; Громов В. Е.; Yu. F. Ivanov; Иванов Ю. Ф.; M. O. Efimov; Ефимов М. О.; Yu. A. Shliarova; Шлярова Ю. А.

doi:10.31857/S2686740023040041

STRUCTURE AND PROPERTIES OF A HIGH-ENTROPY AlCrFeCoNi ALLOY AFTER ELECTRON-ION-PLASMA TREATMENT

作者: Gromov V.¹, Ivanov Y.², Efimov M.¹, Shliarova Y.¹
隶属关系:
1. Siberian State Industrial University
2. Institute of High Current Electronics, Siberian Branch of the Russian Academy of Sciences
期: 卷 511, 编号 1 (2023)
页面: 5-9
栏目: ФИЗИКА
URL: https://journals.rcsi.science/2686-7400/article/view/135929
DOI: https://doi.org/10.31857/S2686740023040041
EDN: https://elibrary.ru/VQNVCP
ID: 135929

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详细

With the help of wire arc additive manufacturing, a HEA of AlCrFeCoNi was prepared: of a non-equiatomic composition, on which a B + Cr film with a thickness of ~1 μm was deposited by plasma-assisted RF sputtering. Subsequent processing consisted in electron-beam irradiation of the surface with the following parameters: energy density 20–40 J/cm², pulse duration 200 μs, frequency 0.3 s^–1, number of pulses 3. A quasi-periodic distribution of chemical elements (at. %) 33.4Al; 8.3Cr; 17.1 Fe; 5.4Co; 35.7 Ni is established. It is shown that at the energy density of the electron beam E_s = 20 J/cm², the microhardness increases by a factor of 2, wear resistance by a factor of 5, and the friction coefficient decreases by a factor of 1.3. High-speed crystallization of the surface layer leads to the formation of a subgrain structure with subgrain sizes (150–200 nm). The increase in strength and tribological properties during electron-beam processing is interpreted taking into account the reduction in grain size, the formation of chromium and aluminum oxyborides, and the formation of a solid solution of boron incorporation into the HEA crystal lattice.

关键词

high-entropy AlCrFeCoNi alloy, B+Cr film, electron-beam processing, phases, elemental composition, properties

参考

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