The AlCoCrFeNi high-entropy alloy (HEA) obtained by vacuum arc melting furnace was introduced into 6061 Al alloy, and a new aluminum matrix composites was prepared by traditional casting method. This paper mainly studies the changes in the microstructure and friction properties of the 6061 Al alloy after introducing 5.0 wt% HEA. With the help of testing apparatus such as optical microscope (OM), scanning electron microscope (SEM), electron probe microanalysis (EPMA), Vickers Hardness Tester and friction testing machine to analyze the microstructure and friction properties of AMCs. Results indicated that the addition of HEA lead to the precipitation of intermetallic compounds (AlCoFeNi, AlCrFe) and nano-scale AlCoFeNi phases with rod morphology distributing in the matrix alloy, and the average diameter of nanophases is approximately 200 nm. Compared with the 6061 Al alloy, the hardness and friction properties of the AMCs were significantly improved. The hardness of AMCs is extremely increased to 70 HV (6061Al alloy: 45.5HV). The coefficient of friction (COF) decreased by 61.8% from 1.78 to 0.68 and wear rate decreased by 43.4% from 2.56 × 10⁻¹³ m³N⁻¹m⁻¹ to 1.45 × 10⁻¹³ m³N⁻¹m⁻¹, when the introduction of HEA reached 5.0 wt%.

将真空电弧熔炼获得的AlCoCrFeNi高熵合金(HEA)引入6061铝合金中，采用传统的铸造方法制备了一种新型铝基复合材料。本文主要研究了6061铝合金在加入5.0 wt% HEA后组织和摩擦性能的变化。借助光学显微镜（OM）、扫描电子显微镜（SEM）、电子探针微量分析（EPMA）、维氏硬度计和摩擦试验机等测试仪器，对AMC的微观结构和摩擦性能进行分析。结果表明，HEA的加入导致金属间化合物（AlCoFeNi、AlCrFe）和纳米级AlCoFeNi相的析出，在基体合金中呈棒状分布，纳米相的平均直径约为200 nm。与6061铝合金相比，AMCs的硬度和摩擦性能有显着提高。AMCs的硬度极大地提高到70 HV（6061Al合金：45.5HV）。摩擦系数 (COF) 从 1.78 下降 61.8% 至 0.68，磨损率从 2.56 × 10 下降 43.4%^-13 m ³ N ^-1 m ^-1到 1.45 × 10 ^-13 m ³ N ^-1 m ^-1，当 HEA 的引入达到 5.0 wt% 时。