Novel Ti-Zr-Hf-Nb-Fe refractory high-entropy alloys for potential biomedical applications

In the present work, TiZrHfNbFex (x = 0, 0.25, 0.5, 0.75, 1, 1.5, and 2, molar ratio) refractory high-entropy alloys (HEAs) were developed. The microstructure, mechanical properties, corrosion wear resistance of Ti-Zr-Hf-Nb-Fe HEAs investigated. exhibited a dendrite structure with body-centered-cubic (BCC) + Laves phases. Among them, TiZrHfNbFe0.5 HEA displayed good comprehensive properties hardness 420 HV, compressive strength 1450 MPa, plastic strain about 8%. addition, possessed better than that Ti6Al4V other in phosphate buffer saline (PBS) solution, which might be related to generation more protective oxide films on its surface. Furthermore, increased raise Fe content. demonstrated superior dry wet comparison alloy. Therefore, high corrosion, resistance, biocompatible constituent elements, as well low cost addition render promising candidates biomedical-implantation materials.