MICROSTRUCTURE AND MECHANICAL PROPERTIES OF TI-NB-ZR-TA-O BIOMEDICAL ALLOY

1 PREISLER Dalibor
Co-authors:
2 VÁCLAVOVÁ Kristína 3 STRÁSKÝ Josef 4 JANEČEK Miloš 5 HARCUBA Petr
Institutions:
1 Charles University in Prague, Faculty of Mathematics and Physics, Department of Physics of Materials, Prague, Czech Republic, EU, preisler.dalibor@gmail.com
2 Charles University in Prague, Faculty of Mathematics and Physics, Department of Physics of Materials, Prague, Czech Republic, EU, kristina.vaclavova@gmail.com
3 Charles University in Prague, Faculty of Mathematics and Physics, Department of Physics of Materials, Prague, Czech Republic, EU, josef.strasky@gmail.com
4 Charles University in Prague, Faculty of Mathematics and Physics, Department of Physics of Materials, Prague, Czech Republic, EU,  janecek@met.mff.cuni.cz
5 Charles University in Prague, Faculty of Mathematics and Physics, Department of Physics of Materials, Prague, Czech Republic, EU,  harcuba.p@seznam.cz
Conference:
25th Anniversary International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 25th - 27th 2016
Proceedings:
Proceedings 25th Anniversary International Conference on Metallurgy and Materials
Pages:
1509-1513
ISBN:
978-80-87294-67-3
ISSN:
2694-9296
Published:
14th December 2016
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
61 views / 10 downloads
Abstract

Recently developed metastable alloy Ti–35.3Nb–7.3Zr–5.7Ta–0.7O (wt.%) abbreviated TNZTO is unique in its high oxygen content and exhibits promising properties for successful use in biomedicine, namely for total endoprostheses and bone fixation. As-cast material is not fully homogeneous; it shows dendritic structure and high density of micro-sized pores. High O content causes increased strength and, interestingly, good ductility with elongation > 12 %. Tensile tests were performed on the as-cast material and material after hightemperature die forging. As-cast material showed yield stress > 900 MPa, whereas yield stress of die-forged material exceeds 1100 MPa. The microhardness tests were also performed on the as-cast and die-forged conditions. Strength values exceed the most used Ti6Al4V alloy and therefore the studied alloy is very perspective for manufacturing load-bearing orthopaedic implants.

Keywords: TNZTO, microstructure, microhardness, tensile properties

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