Increasing strength of a biomedical Ti-Nb-Ta-Zr alloy by alloying with Fe, Si and O
Language English Country Netherlands Media print-electronic
Document type Journal Article
PubMed
28399493
DOI
10.1016/j.jmbbm.2017.03.026
PII: S1751-6161(17)30144-3
Knihovny.cz E-resources
- Keywords
- Ductility, Elastic modulus, Orthopaedic implants, Strengthening mechanisms, Ultrasound spectroscopy, β-Ti alloys,
- MeSH
- Biocompatible Materials analysis MeSH
- Silicon MeSH
- Oxygen MeSH
- Elastic Modulus MeSH
- Niobium MeSH
- Alloys analysis MeSH
- Tantalum MeSH
- Materials Testing MeSH
- Titanium MeSH
- Weight-Bearing MeSH
- Iron MeSH
- Zinc MeSH
- Publication type
- Journal Article MeSH
- Names of Substances
- Biocompatible Materials MeSH
- Silicon MeSH
- Oxygen MeSH
- Niobium MeSH
- Alloys MeSH
- Tantalum MeSH
- Titanium MeSH
- titanium alloy (TiAl6V4) MeSH Browser
- Iron MeSH
- Zinc MeSH
Low-modulus biomedical beta titanium alloys often suffer from low strength which limits their use as load-bearing orthopaedic implants. In this study, twelve different Ti-Nb-Zr-Ta based alloys alloyed with Fe, Si and O additions were prepared by arc melting and hot forging. The lowest elastic modulus (65GPa) was achieved in the benchmark TNTZ alloy consisting only of pure β phase with low stability due to the 'proximity' to the β to α'' martensitic transformation. Alloying by Fe and O significantly increased elastic modulus, which correlates with the electrons per atom ratio (e/a). Sufficient amount of Fe/O leads to increased yield stress, increased elongation to fracture and also to work hardening during deformation. A 20% increase in strength and a 20% decrease in the elastic modulus when compared to the common Ti-6Al-4V alloy was achieved in TNTZ-Fe-Si-O alloys, which proved to be suitable for biomedical use due to their favorable mechanical properties.
References provided by Crossref.org
Microstructural Analysis and Mechanical Properties of TiMo20Zr7Ta15Six Alloys as Biomaterials
