4.7 Article

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

期刊

JOURNAL OF ALLOYS AND COMPOUNDS
卷 906, 期 -, 页码 -

出版社

ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2022.164383

关键词

Metallic biomaterials; High-entropy alloys; Mechanical properties; Corrosion; Wear

资金

  1. Scientific Research Project of Fujian Provincial Department of Science and Technology [2021H0023, 2020I1009, 2021L3015]
  2. Scientific Research Project of Fujian University of Technology [GY-Z21032, GY-Z20057]
  3. Program for Innovative Research Team in Science and Technology in Fujian Province University
  4. National Science Foundation [DMR-1611180]
  5. US Army Research Office Project [W911NF-13-1-0438]
  6. [1809640]
  7. [W911NF-19-2-004 9]

向作者/读者索取更多资源

In this study, TiZrHfNbFex refractory high-entropy alloys (HEAs) were developed and their microstructure, mechanical properties, corrosion resistance, and wear resistance were investigated. The TiZrHfNbFe0.5 alloy exhibited excellent overall mechanical properties and superior corrosion resistance. Additionally, the wear resistance of the alloy increased with the increase in Fe content.
In the present work, the 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 and wear resistance of the Ti-Zr-Hf-Nb-Fe HEAs were investigated. The Ti-Zr-Hf-Nb-Fe HEAs exhibited a dendrite structure with body-centered-cubic (BCC) + Laves phases. Among them, the TiZrHfNbFe0.5 HEA displayed good compre-hensive mechanical properties with the hardness of 420 HV, compressive strength of 1450 MPa, and plastic strain of about 8%. In addition, the TiZrHfNbFe0.5 HEA possessed better corrosion resistance than that of the Ti6Al4V and the other Ti-Zr-Hf-Nb-Fe HEAs in phosphate buffer saline (PBS) solution, which might be re-lated to the generation of more protective oxide films on its surface. Furthermore, the wear resistance of the Ti-Zr-Hf-Nb-Fe HEAs increased with the raise of the Fe content. The TiZrHfNbFe0.5 HEA demonstrated su-perior dry and wet wear resistance in comparison with the Ti6Al4V alloy. Therefore, the good mechanical properties, high corrosion, and wear resistance, the biocompatible constituent elements, as well as the low cost of the Fe addition render the Ti-Zr-Hf-Nb-Fe HEAs as promising candidates as biomedical-implantation materials.(c) 2022 Elsevier B.V. All rights reserved.

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