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Increasing strength of a biomedical Ti-Nb-Ta-Zr alloy by alloying with Fe, Si and O
J. Stráský, P. Harcuba, K. Václavová, K. Horváth, M. Landa, O. Srba, M. Janeček,
Jazyk angličtina Země Nizozemsko
Typ dokumentu časopisecké články, práce podpořená grantem
- MeSH
- biokompatibilní materiály analýza MeSH
- křemík MeSH
- kyslík MeSH
- modul pružnosti MeSH
- niob MeSH
- slitiny analýza MeSH
- tantal MeSH
- testování materiálů MeSH
- titan MeSH
- zatížení muskuloskeletálního systému MeSH
- železo MeSH
- zinek MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem 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.
Citace poskytuje Crossref.org
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- $a Stráský, Josef $u Department of Physics of Materials, Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 5, 121 16 Prague 2, Czech Republic.
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- $a Increasing strength of a biomedical Ti-Nb-Ta-Zr alloy by alloying with Fe, Si and O / $c J. Stráský, P. Harcuba, K. Václavová, K. Horváth, M. Landa, O. Srba, M. Janeček,
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- $a 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.
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