Effects of Ta addition on the microstructures and mechanical properties of CoCrFeNi high entropy alloy

In this study, CoCrFeNiTax (x value in molar ratio, x = 0, 0.1, 0.2, 0.3, 0.4, 0.5, and 0.75) high entropy alloys were prepared to investigate the alloying effects of Ta on the microstructures and mechanical properties. With the addition of Ta element, the microstructure changed from an initial single FCC solid solution (x = 0) to a hypoeutectic microstructure (x = 0.1–0.3), then to a fully eutectic microstructure (x = 0.4) with a mixture of FCC...