Microstructure and thermal properties of the cast WMoTaNb high-entropy alloy

WMoTaNb RHEA has been manufactured using vacuum levitation melting. The as-cast WMoTaNb RHEA has equiaxed grains with a mean grain size of 71.4 μm, and the analysis of the experimental results of thermal conductivity, thermal expansion, and TG-DSC suggests that the as-cast WMoTaNb RHEA has excellent stability at elevated temperature above 1400 °C. This result experimentally explains the previous research on phase and microstructure stability. This study can provide experimental evidence for the high-level stability and help explain the elevated temperature mechanical behaviors of the as-cast WMoTaNb RHEA at elevated temperatures.