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<p>In this study, composite materials featuring various high entropy alloy contents and different sintering temperatures were prepared. The impact of process parameters on the microstructure, mechanical properties, strengthening mechanisms and fracture modes of the composite materials was investigated. The results show that with the increase of HEA particles and the sintering temperatures, these composites exhibit mechanical properties that are superior to those of the unreinforced 6063 aluminum alloy. The comprehensive properties first increased and then slightly decreased. The properties were obviously optimized when the volume fraction of the HEA particles reached 7% and the sintering temperature reached 530&#xa0;°C, with a tensile strength of 224.3 MPa and a tensile fracture elongation of 14.3%. The fractures of composite materials were mainly ductile fractures. The main strengthening methods for the composite materials were Hall–Petch strengthening and dislocation strengthening, by fitting the bivariate strength calculation model, it is found that the yield strength of the composite material can reach 623.6&#xa0;MPa under ideal conditions.</p> Graphical Abstract <p></p>

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Microstructure and Mechanical Properties of Al0.5CoCrFeNi High-Entropy Alloy Reinforced 6063 Aluminum Matrix Composites

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • Zhanwei Yuan,
  • Shurong Li,
  • Ziteng Zhang,
  • Di Zhang,
  • Yuan Yu,
  • Zhaolu Zhang,
  • Xixin Jin

摘要

In this study, composite materials featuring various high entropy alloy contents and different sintering temperatures were prepared. The impact of process parameters on the microstructure, mechanical properties, strengthening mechanisms and fracture modes of the composite materials was investigated. The results show that with the increase of HEA particles and the sintering temperatures, these composites exhibit mechanical properties that are superior to those of the unreinforced 6063 aluminum alloy. The comprehensive properties first increased and then slightly decreased. The properties were obviously optimized when the volume fraction of the HEA particles reached 7% and the sintering temperature reached 530 °C, with a tensile strength of 224.3 MPa and a tensile fracture elongation of 14.3%. The fractures of composite materials were mainly ductile fractures. The main strengthening methods for the composite materials were Hall–Petch strengthening and dislocation strengthening, by fitting the bivariate strength calculation model, it is found that the yield strength of the composite material can reach 623.6 MPa under ideal conditions.

Graphical Abstract