AlCrFeNiCuNb_x (x = 0.05, 0.15, and 0.26) high-entropy alloys (HEAs) were successfully fabricated using the laser metal deposition technique. The laser power of 1600 W and scanning speed of 1.2 m/min were used during laser processing of the alloys. The microstructural, mechanical, and electrochemical characteristics of the alloys were evaluated using various advanced characterization techniques. Results showed that the alloys exhibited a dual-phase structure with dendritic grains. The inclusion of Nb in the AlCrFeNiCu alloy matrix promoted the formation of fine eutectic structures and changed the shape of the grains from columnar to equiaxed. The Cu content decreased with the increase in the content of Nb, whereas the Al content increased with the increase in the content of Nb. The findings indicated that the presence of Nb in the alloy promoted the formation and enhanced the stability of the body-centered cubic (bcc) phase. All of the alloys that contained Nb also exhibited high hardness, compressive strength, and wear resistance. Furthermore, the low current density and positive shift in potential exhibited by HEAs with appropriate addition of Nb highlighted the superior anticorrosive properties.

AlCrFeNiCuNb _x（x= 0.05、0.15和0.26）使用激光金属沉积技术成功制造了高熵合金（HEA）。在合金的激光加工过程中，使用了1600 W的激光功率和1.2 m / min的扫描速度。使用各种先进的表征技术评估了合金的微观结构，力学和电化学特性。结果表明，合金显示出具有树枝状晶粒的双相结构。AlCrFeNiCu合金基体中包含Nb促进了精细的共晶组织的形成，并使晶粒的形状从柱状转变为等轴状。Cu含量随着Nb含量的增加而减少，而Al含量随着Nb含量的增加而增加。研究结果表明，合金中Nb的存在促进了体心立方（bcc）相的形成并增强了其稳定性。所有包含Nb的合金也表现出高硬度，抗压强度和耐磨性。此外，在适当添加Nb的情况下，HEA表现出的低电流密度和电势正偏移突出了优异的防腐性能。