Refractory high entropy alloys (RHEAs) exhibit high strength, high hardness and stable microstructure over a wide range of temperatures. However, these alloys are also characterized by poor ductility. Total strain to failure of 6.2% at room temperature was observed in equiatomic WMoVCrTa RHEA. Attempts are made to improve the mechanical properties by altering the composition of existing RHEAs. This report presents the results of mechanical properties viz., room and elevated temperature properties of W₂₃Mo₂₃V₁₇Cr₈Ta₇Fe₂₂ and WMoVCrTa RHEAs fabricated by mechanical alloying followed by vacuum arc melting. Both the arc melted alloys revealed presence of two Body-Centered Cubic (BCC) structured phases along with a small amount of intermetallic phase. The arc melted W₂₃Mo₂₃V₁₇Cr₈Ta₇Fe₂₂ alloy exhibited compressive yield strength of 1688 MPa and an ultimate strain of 7.3% at room temperature whereas at 1000 °C the corresponding values were 1514 MPa and 10.6%. At 1000 °C the arc melted equiatomic WMoVCrTa alloy exhibited compressive yield strength of 785 MPa and an ultimate strain of 5.7%, whereas at 1200 °C the corresponding values were 941 MPa and 8.3%. Yield stress anomaly was observed for the two alloys at elevated temperatures. Both alloys possess high hardness at room temperature. The two RHEAs appear to be viable materials for high-temperature applications like gas turbine blades, combustion chamber lining, high-temperature coating, nuclear reactor walls, etc., due to their combination of high hardness, high strength and yield strain at elevated temperatures.

难熔高熵合金 (RHEA) 在很宽的温度范围内表现出高强度、高硬度和稳定的微观结构。然而，这些合金的特征还在于延展性差。在等原子 WMoVCrTa RHEA 中观察到室温下 6.2% 的总失效应变。尝试通过改变现有 RHEA 的组成来改善机械性能。本报告介绍了机械性能的结果，即 W ₂₃ Mo ₂₃ V ₁₇ Cr ₈ Ta ₇ Fe _{22 的}室温和高温性能和 WMoVCrTa RHEAs 通过机械合金化和真空电弧熔化制造。两种电弧熔化合金都显示存在两种体心立方 (BCC) 结构相以及少量金属间相。电弧熔化 W ₂₃ Mo ₂₃ V ₁₇ Cr ₈ Ta ₇ Fe ₂₂合金在室温下表现出 1688 MPa 的压缩屈服强度和 7.3% 的极限应变，而在 1000 °C 时相应的值为 1514 MPa 和 10.6%。在 1000 °C 时，电弧熔化的等原子 WMoVCrTa 合金的压缩屈服强度为 785 MPa，极限应变为 5.7%，而在 1200 °C 时，相应的值为 941 MPa 和 8.3%。在升高的温度下观察到两种合金的屈服应力异常。两种合金在室温下都具有高硬度。由于这两种 RHEA 结合了高硬度、高强度和高温屈服应变，这两种 RHEA 似乎是燃气轮机叶片、燃烧室衬里、高温涂层、核反应堆壁等高温应用的可行材料.