Aluminum-matrix composite materials fabricated by liquid-phase stirring and reinforced with SiC particles and Al2O3 discrete nanofibers have been studied. The increase in the yield strength by 50% is achieved by the introduction of 1% of Al2O3 nanofibers fixed on copper. The increase in strength of aluminum-matrix composites by grain refinement corresponds to the Hall–Petch equation. The correction factor (0.25–0.3) was established and experimentally confirmed for predicting of the strength of aluminum-matrix composites using measurements of the HB hardness. © 2022, Pleiades Publishing, Ltd.

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