EVOLUTION OF THE SURFACE LAYER OF THE Al-15%Si – Y2O3 SYSTEM AFTER COMBINED TREATMENT
ICIJUA
DOI:
https://doi.org/10.25712/ASTU.2072-8921.2025.01.025Keywords:
hypereutectic silumin, electroexplosive alloying, irradiation, pulsed electron beam, elemental composition, structure, tribologyAbstract
Al-Si alloys are indispensable in various industries such as aerospace and automotive due to their high strength-to-weight ratio, excellent thermal conductivity and corrosion resistance. These alloys often contain elements such as Si, Cu, Mg and Zr, which improve their properties, and special compositions can increase strength, wear resistance and improve the grain structure. The paper describes a complex modification of the surface layer of the hypereutectic Al-15% Si alloy, combining electroexplosive alloying with the Al-Y2O3 system followed by irradiation with a pulsed electron beam. It was found that the complex treatment leads to a multiple increase in the wear resistance of the modified silumin layer by ~ 7.6 times. The formation of a multilayer multielement multiphase structure of the modified sample volume up to 35 μm thick, strengthened by nanosized oxide particles, was revealed. It has been established that irradiation of the surface of a silumin sample subjected to electroexplosive alloying with a pulsed electron beam does not lead to dissolution of yttrium oxide powder; the surface of the sample contains areas enriched with yttrium atoms. It is suggested that the combined treatment of silumin leads to a multiple increase in its wear resistance. This is due to the formation of nanoscale particles of the oxide phase in the surface layer of the material
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Copyright (c) 2025 Yulia A. Shliarova, Vitaly V. Shlyarov, Irina A. Panchenko, Ivanov Y. Fedorovich, Dmitry V. Zaguliaev, Alexander N. Prudnikov
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