Journal
INTERMETALLICS
Volume 145, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2022.107568
Keywords
Medium entropy alloys (MEAs); Microstructure; Mechanical properties; Solid solution; Corrosion behavior; Biocompatibility
Categories
Funding
- Natural Science Foundation of Hunan Province [2021JJ40761]
- State Key Laboratory of Powder Met-allurgy, Central South University, Changsha, China
Ask authors/readers for more resources
This study investigates the potential of three medium entropy alloys (MEAs) as biomedical materials. The alloys exhibit a dendrite microstructure, which can be reduced through homogenization treatment. The MEAs show good compressive ductility and yield strength, as well as excellent corrosion resistance and cyto-compatibility. The Ti-Nb-Zr MEAs have promising potential in biomedical applications.
In this study, three medium entropy alloys (MEAs), TiNbZr, Ti1.5Nb1.5Zr and Ti1.5NbZr1.5 were designed and investigated to be applied as biomedical materials. The results showed that the alloys prepared by arc melting have a typical dendrite microstructure, caused by elemental segregation during solidification. With composition changes, the partition of the constituting elements behaves differently. The microstructure inhomogeneity and chemical segregation could be greatly reduced by homogenization treatment. The MEAs show good compressive ductility (>40%) and yield strength comparable to or even superior to those of the commercially used biomedical alloys (e.g., 316 stainless steel and pure titanium), which are mainly contributed from the solid-solution strengthening effect. In addition, these MEAs exhibit acceptable Young's modulus ranging from 80 to 93 GPa by nano-indentation tests. The alloys also show excellent corrosion resistance in the phosphate buffer saline (PBS) solution and favorable cyto-compatibility, which are comparable to or even superior to pure titanium and/ or Ti-6Al-4V alloys. Based on these properties, the Ti-Nb-Zr MEAs show a promising potential in biomedical applications. The results in this study could be instructive for further alloy design of such biomedical MEAs.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available