1060 Al and Al_0.1CoCrFeNi are friction stir lap welded in this study in order to improve the microstructure and mechanical property of the high-entropy alloy by adding Al element into the alloy through friction stir processing. The results indicate that a crescent-shaped aluminum-addition zone featured by limited upward material flow is formed in the high-entropy alloy. The aluminum-addition friction stir processing leads to the formation of fine and homogeneously distributed microstructures and the occurrence of body-centered cubic phases in the high-entropy alloy. Owing to the synthetical strengthening effects caused by friction stir modification and Al content increase, the hardness of the Al_0.1CoCrFeNi alloy is increased significantly from 100 Hv to an average value over 400 Hv and a maximum value of 600 Hv. The present study is able to provide an effective approach for the preparation and strengthening of high-entropy alloys.

为了通过摩擦搅拌工艺向合金中添加Al元素来改善高熵合金的组织和力学性能，本研究采用1060 Al和Al _0.1 CoCrFeNi进行摩擦搭接焊。结果表明，在高熵合金中形成了以有限的向上材料流动为特征的月牙形铝添加区。铝添加摩擦搅拌处理导致在高熵合金中形成细微且均匀分布的微观结构，并出现体心立方相。由于摩擦搅拌改性和Al含量增加引起的综合强化作用，Al _0.1的硬度CoCrFeNi合金从100 Hv显着增加到400 Hv以上的平均值和600 Hv的最大值。本研究能够为高熵合金的制备和强化提供有效途径。