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The evaluation of mechanical properties for a Ti-Ta-Nb biocompatible alloy

V. D. COJOCARU1,2, T. GLORIANT3, D. M. GORDIN3, E. BERTRAND3, D. RADUCANU2, I. CINCA2,* , I. DAN4

Affiliation

  1. National Institute for Research and Development in Microtechnologies, Bucharest - Romania
  2. University Politehnica of Bucharest, Bucharest - Romania
  3. UMR CNRS 6226 Sciences Chimiques de Rennes/Chimie-Métallurgie, Rennes Cedex - France
  4. SC R&D Consulting and Services, Bucharest - Romania

Abstract

Titanium alloys are extensively used in a variety of applications due to their good mechanical properties and corrosion resistance. Recently, β-type Ti alloys composed of non-toxic elements have received much attention, because they feature not only high specific strength, bio-corrosion resistance, no allergic problems and biocompatibility. Recent studies revealed that a compromise along the biomedical constrains mentioned above can be obtained by designing Ti alloys which use the most biocompatible elements, i.e. Ta, Nb, Mo, Mb and Zr, as alloy ingredients for stabilizing the β-phase. A Ti-25Ta-25Nb β-type titanium biocompatible alloy was subjected to thermo-mechanical processing and testing. Three states were investigated: as-cast, cold-rolled and recrystallized. Data concerning ultimate tensile strength (σUTS), yield strength (σYS), elongation to fracture (εf) and elastic modulus (E) were analysed. The fracture surfaces of the investigated samples were also analysed..

Keywords

Titanium alloy, Biocompatibility, Thermomechanical processing.

Submitted at: March 10, 2011
Accepted at: July 25, 2011

Citation

V. D. COJOCARU, T. GLORIANT, D. M. GORDIN, E. BERTRAND, D. RADUCANU, I. CINCA, I. DAN, The evaluation of mechanical properties for a Ti-Ta-Nb biocompatible alloy, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 7, pp. 912-916 (2011)