Composition optimization of low modulus and high-strength TiNb-based alloys for biomedical applications

Document Type

Journal Article

Publication Title

Journal of the Mechanical Behavior of Biomedical Materials

Publisher

Elsevier

School

School of Engineering

RAS ID

27098

Comments

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

Abstract

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.

DOI

10.1016/j.jmbbm.2016.10.013

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