Effects of heat treatment on corrosion properties and mechanical behavior of titanium alloys used as biomaterials

Titanium and its alloys used in biomaterial applications are preferred cause of high corrosion resistance properties in addition to having good mechanical properties. In this thesis, CP-Ti (Grade 2), Ti6Al4V (Grade 5) and Ti6Al4V-ELI (Grade 23) samples used as biomaterials heat treated at 750 oC and 1060 oC for 1 hour. The samples were cooled in air after heat treatment at 750 oC, the other samples were cooled in water after heat treatment at 1060 oC, The sample series without heat treatment are the materials in production conditions. Microstructures of heat treated samples and non-made samples by comparison were evaluated before and after corrosion process microstructures and tensile strengths. Corrosion environment is designed as 0,5 mol H2SO4 + 1 mol HCl solution. In this thesis, the corrosion resistance of the samples with and without heat treatment were evaluated. Microstructure images were monitorized on optical and SEM microscopes. At the end of the thesis, that the heat treatment it was determined changed the material microstructures, mechanical properties and corrosion resistances of the material. As a result, heat treatment is useful on corrosion resistannce of alloyed samples. Key Words: Biomaterials, Titanium, Corrosion, Heat Treatment, Mechanical Behavior