Mechanical properties and corrosion fatigue of new titanium alloys for medical implants in physiological saline solution

Abstract

The corrosion fatigue and mechanical properties of Ti-15%Zr-4%Nb-4%Ta-0.2%Pd-0.2%O-0.05%N and Ti-15%Sn-4%Nb-2%Ta-0.2%Pd-0.2%O alloys were compared with those of Ti-6%Al-4%V ELI, Ti-6%Al-2%Nb-1%Ta and β type Ti-15%Mo-5%Zr-3%Al alloys for medical implants by corrosion fatigue testing in a physiological saline solution at 310 K and tensile testing at room temperature. The corrosion fatigue test was carried out under the condition of a tension to tension mode with a sine wave at a stress ratio of 0.1 and at a frequency of 10 Hz in eagle's MEM + bovine serum solution using an environment cell with 90%N2 + 5%CO2 + 5%O2 gas bubbling.