采用真空电弧熔炼技术制备出不同 Al 含量的 Alx CoCrFeNiCu2的高熵合金,研究 Al 含量对该高熵合金的微观组织及力学性能的影响.结果表明,该铸态高熵合金合金具有简单的 bcc 相固溶体结构及fcc 相固溶体结构.Alx CoCrFeNiCu2(x ＝1,2和3)合金中 fcc 相固溶体的含量在增加；当 x ＝4,5时,合金中bcc 相固溶体的含量增加.合金的硬度随着 Al 元素的增加而提高.制备出的5种合金中 Al4 CoCrFeNiCu2硬度值最高.Al3 CoCrFeNiCu2高熵合金具有较高的屈服强度和断裂强度.
Different content of Alx CoCrFeNiCu2 high-entropy alloy were prepared by vacuum arc melting furnace and the effect of Al content on microstructure and mechanical properties was investigated.The results showed that the as-cast high-entropy alloys are mainly composed of simple bcc and fcc solid solution.The Alx-CoCrFeNiCu2 (x =1,2,3)alloy phase structure was transformed from bcc to fcc with the increase of Al con-tents.When x =4,5 ,the content of bcc solid is increased.With the addition of Al content,the hardness of the alloy was improved.The Al4 CoCrFeNiCu2 has the highest hardness.Al3 CoCrFeNiCu2 appeares the best me-chanical properties.
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