Al_0.5Cr_0.9FeNi_2.5V_x (x = 0, 0.2, 0.4, 0.6, 0.8, 1.0) multi-principal alloys were prepared by vacuum arc melting. The effect of vanadium addition on its microstructure and properties was investigated. The results show that the alloys of all components exhibited an FCC single-phase structure. With the addition of vanadium, the microstructure of the alloy changed from dendrites to equiaxed crystals, the grains were remarkably refined, and the layered CrV phase was exhibited, which improved the properties of the alloy. The yield strength of the alloy was slightly improved, and the alloys with various components presented good plasticity. When V content reached 0.8, the yield strength was 600 MPa, and no fracture occurred. Friction–wear testing showed that the wear debris was reduced with the addition of V element. The sample with V element content of 0.4 had the best friction and wear performance. The surface grooves became shallow, the worn debris was less, and the wear mechanism was mainly abrasive wear. The polarisation curve showed that the alloy with V element content of 0.2 has the best corrosion resistance. The passivation interval reached 900 mV. The corrosion potential and the corrosion current density were − 496.299 mV and 2.759 μA/cm², respectively.

Al _0.5 Cr _0.9 FeNi _2.5 V _x（x = 0、0.2、0.4、0.6、0.8、1.0）通过真空电弧熔化制备了多种主要合金。研究了钒添加对其微观结构和性能的影响。结果表明，所有组分的合金均表现出FCC单相结构。加入钒后，合金的微观结构从树枝状转变为等轴晶，晶粒明显细化，并呈现出层状CrV相，从而改善了合金的性能。合金的屈服强度略有提高，并且具有各种组分的合金表现出良好的可塑性。当V含量达到0.8时，屈服强度为600MPa，没有断裂。摩擦磨损测试表明，添加V元素可减少磨损碎片。V元素含量为0的样本。4具有最佳的摩擦和磨损性能。表面沟槽变浅，磨损的碎屑少，磨损机理主要是磨料磨损。极化曲线表明，V元素含量为0.2的合金具有最佳的耐蚀性。钝化间隔达到900 mV。腐蚀电位和腐蚀电流密度分别为− 496.299 mV和2.759μA/ cm^2个。