Importance of Individual Evaluation of Crystallographic Texture and Microstructure Effects on Biocompatibility and Corrosion Performance of Ti6AI4V Alloy

The exclusive effect of crystallographic texture and microstructure on biocorrosion behavior, wettability and biocompatibility of Ti6A14V (Ti64) alloy has been studied. Potentiodynamic polarization and EIS results showed that the DA-TD surface, in which {0002} and {11 (2) over bar0 } crystallographic planes are placed parallel to the surface, exhibited the most inferior corrosion rate of 2.2 x 10(-5 )mm/year. It was shown that this was due to the formation of a thick oxide layer on the surface as a result of the high surface energy. In contrast, the { 10 (1) over bar0} planes are most susceptible to corrosion as a result of a thin oxide layer formed on the surface. Most inferior water contact angle of 63.5 degrees (indicatimg more hydrophilicity) belonged to the DA-TD surface with high surface energy. Moreover, the MTT assay showed that the existence of {0002} and {11 (2) over bar0} high-energy planes parallel to the surface leads to the high MG-63 cell viability percentage at 24, 48, and 72 h.