Abstract A composite of two different medium entropy alloys (MEAs, i.e., CoCrFeNi and AlCoCrFe) was synthesized using ball milling and spark plasma sintering. The composite microstructure contains a homogenous distribution of fcc and bcc phases with submicron-sized grains and exhibits excellent microstructural and phase stability even after 100 h heat treatment at 800 °C. The composite provides a combination of high compressive strength, adequate plastic strain, and multiple strain-hardening stages at room temperature. This first exploratory study on a MEA composite can be used as a template to other systems and illustrates the feasibility of combining two or more MEAs.

中文翻译：

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使用放电等离子烧结合成的中等熵合金的复合材料

摘要 采用球磨和放电等离子烧结法合成了两种不同的中熵合金（MEAs，即CoCrFeNi 和AlCoCrFe）的复合材料。复合微观结构包含均匀分布的 fcc 和 bcc 相，具有亚微米尺寸的晶粒，即使在 800 °C 下热处理 100 小时后仍表现出优异的微观结构和相稳定性。该复合材料在室温下提供了高抗压强度、足够的塑性应变和多个应变硬化阶段的组合。对 MEA 复合材料的首次探索性研究可用作其他系统的模板，并说明了结合两个或多个 MEA 的可行性。