STRUCTURE AND PROPERTIES OF A HIGH-ENTROPY AlCrFeCoNi ALLOY AFTER ELECTRON-ION-PLASMA TREATMENT
- Authors: Gromov V.E.1, Ivanov Y.F.2, Efimov M.O.1, Shliarova Y.A.1
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Affiliations:
- Siberian State Industrial University
- Institute of High Current Electronics, Siberian Branch of the Russian Academy of Sciences
- Issue: Vol 511, No 1 (2023)
- Pages: 5-9
- Section: 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
Cite item
Abstract
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 Es = 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.
About the authors
V. E. Gromov
Siberian State Industrial University
Author for correspondence.
Email: gromov@physics.sibsiu.ru
Russia, Novokuznetsk
Yu. F. Ivanov
Institute of High Current Electronics, Siberian Branch of the Russian Academy of Sciences
Email: gromov@physics.sibsiu.ru
Russia, Tomsk
M. O. Efimov
Siberian State Industrial University
Email: gromov@physics.sibsiu.ru
Russia, Novokuznetsk
Yu. A. Shliarova
Siberian State Industrial University
Email: gromov@physics.sibsiu.ru
Russia, Novokuznetsk
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