Novel Ti–Zr–Hf–Nb–Ta–Mo High-Entropy Alloys for Metallic Biomaterials

Abstract

Noble nonequiatomic Ti–Zr–Hf–Nb–Ta–Mo high-entropy alloys (HEAs) for metallic biomaterials (BioHEAs) were designed and developed. Ti28.33Zr28.33Hf28.33Nb6.74Ta6.74Mo1.55 (at%) BioHEA exhibits biocompatibility that is comparable to that of commercial-purity Ti (CP–Ti), with higher mechanical strength than CP–Ti and appropriate room-temperature ductility available for tensile tests. The Moeq, as well as the VEC parameters, were useful for alloy design with body-centered cubic (BCC) structure formation in bio medium-entropy alloys and BioHEAs.