The microstructure, mechanical properties and tribological behaviors of aluminum matrix composites with different contents of AlFeNiCrCoTi high-entropy alloy (HEA) (4.0, 5.0 and 6.0 wt%) were investigated. The as-cast specimens were analyzed by the scanning electron microscopy and electron probe micro-analysis. The results indicated that flake-like and blocky intermetallic compounds precipitated distributing in α-Al matrix in the solidification when the concentration of HEA was more than 4.0 wt% in pure aluminum. Moreover, as the content of HEA increased, the number of the intermetallic compounds increased. Meanwhile, a new phase formed and it distributed inter-dendrite of α-Al in the solidification, which morphology was rod-shaped and the diameter was less than 200 nm. The area fraction of the nano-phases increased, and the diameter decreased with increasing the addition of HEA in pure aluminum. The tensile test illustrated that the ultimate tensile strength increased firstly and then decreased with the increase of HEA content. When the addition concentration of HEA was 4.0 wt%, the ultimate tensile strength enhanced from 58 to 142 MPa. When 5.0 wt% HEA was added into pure aluminum, the ultimate tensile strength further improved from 142 to 170 MPa. In addition, the elongation decreased from 40.6 to 22.7%. However, when 6.0 wt% HEA was added into pure aluminum, the ultimate tensile strength and elongation reduced to 157 MPa and 18.2%, respectively. The tribological behaviors of aluminum matrix composites were investigated under the condition of seawater. The friction coefficient and wear rate of aluminum matrix composites significantly decreased with the increase of HEA content. Moreover, when the addition level was up to 6.0 wt%, the friction coefficient of aluminum matrix composites decreased by 71.1% from 0.83 to 0.24, and wear rate decreased by 90.8% from 2.48 × 10⁻⁹ m³ N⁻¹ m⁻¹ to 2.27 × 10⁻¹⁰ m³ N⁻¹ m⁻¹.

研究了不同含量（4.0％，5.0％和6.0％）的AlFeNiCrCoTi高熵合金（HEA）的铝基复合材料的组织，力学性能和摩擦学行为。通过扫描电子显微镜和电子探针显微分析来分析铸态样品。结果表明，当纯铝中HEA的浓度大于4.0 wt％时，凝固过程中片状和块状金属间化合物沉淀分布在α-Al基体中。此外，随着HEA含量的增加，金属间化合物的数量增加。同时，在凝固过程中形成了一个新的相并分布了α-Al的枝晶，其形态为棒状，直径小于200 nm。纳米相的面积分数增加，直径随着纯铝中HEA含量的增加而减小。拉伸试验表明，极限拉伸强度随HEA含量的增加先增大，然后减小。当HEA的添加浓度为4.0重量％时，极限抗拉强度从58MPa增加至142MPa。当将5.0重量％的HEA添加到纯铝中时，极限拉伸强度从142MPa进一步提高到170MPa。另外，伸长率从40.6降低到22.7％。但是，当将6.0 wt％的HEA添加到纯铝中时，极限抗拉强度和伸长率分别降至157 MPa和18.2％。研究了在海水条件下铝基复合材料的摩擦学行为。铝基复合材料的摩擦系数和磨损率随着HEA含量的增加而显着降低。此外，当添加量高达6.0 wt％时，铝基复合材料的摩擦系数从0.83降低71.1％至0.24，磨损率从2.48×10降低90.8％。^-9  m ³  N ^-1  m ^-1至2.27×10 ^-10  m ³  N ^-1  m ^-1。