Al0.1CoCrFeNi high-entropy alloy (HEA) was synthesized successfully from elemental powders by mechanical alloying (MA) and subsequent consolidation by spark plasma sintering (SPS). The alloying behavior, microstructure, and mechanical properties of the HEA were assessed using X-ray diffraction, electron microscope, hardness, and compression tests. MA of the elemental powders for 8 h has resulted in a two-phased microstructure: α-fcc and β-bcc phases. On the other hand, the consolidated bulk Al0.1CoCrFeNi-HEA sample reveals the presence of α-fcc and Cr23C6 phases. The metastable β-bcc transforms into a stable α-fcc during the SPS process due to the supply of thermal energy. The hardness of the consolidated bulk HEA samples is found to be 370 ± 50 HV0.5, and the yield and ultimate compressive strengths are found to be 1420 and 1600 MPa, respectively. Such high strength in the Al0.1CoCrFeNi HEA is attributed to the grain refinement strengthening.

通过机械合金化（MA）成功地从元素粉末中合成了Al 0.1 CoCrFeNi高熵合金（HEA），随后通过火花等离子体烧结（SPS）固结了Al 0.1 CoCrFeNi高熵合金。使用X射线衍射，电子显微镜，硬度和压缩测试评估了HEA的合金化行为，微观结构和力学性能。元素粉末在8小时内的MA产生了两相微观结构：α-fcc和β-bcc相。另一方面，固结的大块Al 0.1 CoCrFeNi-HEA样品显示存在α-fcc和Cr 23 C 6相。亚稳态β-bcc转变为稳定的α-fcc在SPS过程中由于提供了热能。固结的HEA样品的硬度为370±50 HV 0.5，屈服强度和极限抗压强度分别为1420和1600 MPa。Al 0.1 CoCrFeNi HEA中如此高的强度归因于晶粒细化强化。