| Abstrakt: |
This paper was mainly aimed to the investigate the corrosion behavior of five different titanium – based alloys Ti-15Mo (metastable β phase), Ti-13Zr-13Nb (β-rich), Ti-8Mo-4Nb-2Zr (β-phase). For comparing, Cp- Ti (α – phase) and Ti-6Al-4V (α+β phases) were used. This paper is divided in two parts. The first part characterizes the five different titanium – based alloys before corrosion tests. The alloys were characterized using X- ray diffraction (XRD), optical microscopy (OM), scanning electron microscopy (SEM), and micro-hardness. In the second part, the corrosion behavior of the five different titanium – based alloys were investigated in Ringer solution at 37°C. Initially, the open circuit potential (OCP) were measured in Ringer solution at 37°C before corrosion tests. Potentiodynamic polarization technique was used to investigate the corrosion behavior of alloys. XRD, OM, and SEM analysis showed that the Ti-15Mo consisted of two phases (α +β) so it is (metastable β phase), Ti-13Zr-13Nb consisted predominantly of β – phase and α – phase in some regions so it is (β-rich), and Ti-8Mo-4Nb-2Zr consisted of single phase β – phase. Cp- Ti consisted of single phase α – phase and Ti-6Al-4V consisted of two phases α+β as expected. Ti-8Mo-4Nb-2Zr had average Vickers micro – hardness higher than others did, while, Cp – Ti had the lowest average Vickers micro – hardness. Ti-8Mo-4Nb-2Zr exhibited better corrosion resistance than others alloys. These results indicated that the Ti-8Mo-4Nb-2Zr might be a good candidate for biomedical applications. [ABSTRACT FROM AUTHOR] |
