Composition optimization of low modulus and high-strength TiNb-based alloys for biomedical applications
Journal of the Mechanical Behavior of Biomedical Materials
School of Engineering
The effect of chemical composition on microstructure and tensile properties of a series of low modulus Ti-Nb-Cu-Ni-Al alloys was studied. These alloys consist of primary micrometer-sized β-Ti dendrites surrounded by intermetallic phases. The morphology of the intermetallic phases is strongly affected by composition. Due to the composite microstructure, the alloys exhibit a low Young's modulus (77–84 GPa) together with a high yield strength of about 1000 MPa as well as moderate tensile ductility. The results demonstrate that complete substitution of Al by Ti reduces the Young's modulus by 5%. Increasing Nb content at the expense of Ti causes a significant improvement of tensile ductility.
Okulov, I. V., Volegov, A. S., Attar, H., Bönisch, M., Ehtemam-Haghighi, S., Calin, M., & Eckert, J. (2017). Composition optimization of low modulus and high-strength TiNb-based alloys for biomedical applications. Journal of the Mechanical Behavior of Biomedical Materials, 65, 866-871. https://doi.org/10.1016/j.jmbbm.2016.10.013