An equiatomic CoCrFeNiMn high-entropy alloy was prepared by induction melting and a progressive combination of mechanical alloying and compaction via spark plasma sintering done at temperatures of 800 °C and 1000 °C. The chosen methods of preparation had a significant impact on the microstructure and mechanical properties of the alloy. In comparison, the as-cast alloy had a much coarser microstructure while simultaneously obtaining inferior mechanical properties compared to those of the 8-h mechanically alloyed and spark plasma sintered alloy compacted at 1000 °C, which achieved a hardness of 424 ± 7 HV, and the alloy compacted at 800 °C showed a lower but still highly comparable hardness of 352 ± 12 HV. Both alloys showed good thermal stability, as expressed by almost negligible hardness changes during 100 h of annealing at temperatures of 400 °C and 600 °C. The investigated alloys also showed their superiority during compressive stress-strain tests at ambient and elevated temperatures of 400 °C and 600 °C. At ambient temperature, the highest compressive yield strength of 1534 MPa was observed for the sample compacted at 800 °C. As the temperature of the compressive test increased, the investigated alloys reduced their compressive yield strengths.

通过在800°C和1000°C的温度下进行火花等离子体烧结，通过感应熔化以及机械合金化和压制的逐步结合，制备了等原子的CoCrFeNiMn高熵合金。选择的制备方法对合金的微观结构和力学性能有重大影响。相比之下，与在1000°C下压实的8-h机械合金化和火花等离子烧结合金相比，铸态合金具有更粗糙的显微组织，同时获得较差的机械性能，其硬度为424±7 HV，并且在800°C下压实的合金显示出较低的硬度，但仍然非常可比，为352±12 HV。两种合金均显示出良好的热稳定性，如在400°C和600°C的温度下退火100 h期间几乎可以忽略的硬度变化所表示的。所研究的合金还在环境温度和400°C和600°C的高温下的压缩应力-应变测试中显示出优越性。在环境温度下，在800°C下压实的样品的最高压缩屈服强度为1534 MPa。随着压缩试验温度的升高，所研究的合金降低了其压缩屈服强度。