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Microstructure and Wear Properties of Friction Stir Processed AZ31 Magnesium Matrix Composites Reinforced with FeCoCrNiMn High Entropy Alloy Particles
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Resumo(s)
Metal matrix composites, combining AZ31 magnesium alloy and FeCoCrNiMn high entropy alloy (HEA), were fabricated by multipass friction stir processing (FSP). The effect of the HEA particles on the matrix grain size, the distribution morphology of HEA particles, the interface between matrix and reinforcement phases, and the effect of adding HEA particles on the mechanical and wear properties of the fabricated material were systematically investigated. The clustering of HEA particles occurred in the magnesium matrix, and the addition of HEA particles enhances the effect of recrystallization during the FSP process and effectively refines the grain size. The HEA reinforcement is found to have good interfacial bonding with the matrix, with no defects. Evidence of short-range diffusion is observed, attributed to the thermal cycles associated with the FSP processing. After undergoing five processing passes, the fabricated composite material achieved a tensile strength of 255.46 MPa and maintained an excellent elongation of 16.57%. The composite material exhibits optimal wear resistance, with the average coefficient of friction reduced from the original base material's 0.239 to 0.188 in the optimized processed area. Moreover, the wear mechanism changed from adhesive wear of the base metal to abrasive wear in the processed material.
Descrição
This work was supported by the National Natural Science Foundation of China (grant no. 52175326) Young Elite Scientist Sponsorship Program by CAST (grant no.YESS20210452AE).
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© 2025 Wiley-VCH GmbH.
Palavras-chave
high-entropy alloys magnesium matrix composites microstructures short-range diffusions wear properties General Materials Science Condensed Matter Physics