Comparison of fatigue strengths of biocompatible Ti-15Zr-4Nb-4Ta alloy and other titanium materials

The fatigue strength of an annealed Ti-15Zr-4Nb-4Ta alloy at 1 x 10(8) cycles was approximately 730 MPa. The fatigue strength of its alloy was much improved following an ageing treatment after a solution treatment. The tension-to-tension fatigue strengths of annealed Ti-6Al-4V, V-free Ti-6Al-7Nb, Ti-6Al-2Nb-1Ta, and Ti-15Mo-5Zr-3Al alloys at 1 x 10(8) cycles were approximately 685, 600, 700, and 350 MPa, respectively. The ratios of fatigue strength at 1 x 10(8) cycles to ultimate tensile strength for the alpha- and (alpha + beta)-type Ti materials were higher than 65%. (C) 2010 Elsevier B.V. All rights reserved.