A series of Al_0.3CoFeMnNiB_x high-entropy alloys (x = 0−0.5 in molar ratio) were prepared by vacuum arc melting method. The as-cast Al_0.3CoFeMnNi alloy possesses face-centered cubic crystal structure. With boron addition, interdendritic borides are formed. The volume fraction and size of the borides increase with the enhancement of the boron content. The hardness dramatically rises from 4.04 GPa to 8.06 GPa with improving x from 0 to 0.5. The maximum yield strength and compressive strength were found to be 1050 and 1710 MPa, respectively, when x is 0.4. The compressive strain continuously decreases from 37.0% to 24.9% as x increasing from 0.2 to 0.5. The corrosion resistance gradually degrades with increasing the boron content.

 采用真空电弧熔炼法制备了一系列Al _0.3 CoFeMnNiB _x高熵合金（摩尔比x = 0-0.5）。铸态Al _0.3 CoFeMnNi合金具有面心立方晶体结构。随着硼的加入，形成枝晶间硼化物。硼化物的体积分数和尺寸随着硼含量的增加而增加。随着x从 0提高到 0.5 ，硬度从 4.04 GPa 急剧上升到 8.06 GPa 。当x为 0.4时，最大屈服强度和抗压强度分别为 1050 和 1710 MPa 。随着x 的增加，压缩应变从 37.0% 持续下降到 24.9%从 0.2 增加到 0.5。随着硼含量的增加，耐蚀性逐渐降低。