| Abstract Scope |
Refractory high-entropy alloys (RHEAs) are important candidate materials for the design of advanced high-temperature structural materials. In this work, WMoVTiCr RHEAs were synthesized by mechanical alloying. The effect of Cr variation, second phase formation, and sintering temperature on microstructural evolution and mechanical properties of the model alloys were investigated. The results demonstrate that the alloy mainly consists of BCC solid solution phase, Ti-rich oxides, and a trace of a Laves phase. The hardness and compressive strength increase significantly with increasing Cr content, which could be ascribed to the microstructure refinement, solid solution, and oxide dispersion strengthening. Moreover, a lower sintering temperature caused incomplete solid solution, thereby reducing material performance. |