Evaluation of Corrosion Behavior of Ni/Be-free Titanium-Based Metallic Glasses Fabricated by Vacuum Arc Melting Method

Bulk titanium-based metallic glass with amorphous structure has led to the creation of special properties, which can be used as a suitable alternative to metallic biomaterials with crystalline structure. In the present study, bulk titanium-based metallic glass without Ni and Be elements produced by vacuum arc melting and cast into a 4 mm diameter mold. The evaluation of the results showed that the Ti50Zr15Cu20Mo7Ag4Sn3Si1 metallic glass has a composite structure of dispersed crystalline phases (α-Ti, β-Ti and Ti2Cu) in a glassy field. However, the Ti50Zr25Cu5Mo10Ag6Sn3Si1 alloy has a higher glass formation ability (GFA) and the crystalline phases formed in the Ti50Zr15Cu20Mo7Ag4Sn3Si1 alloy disappeared with increasing the amount of alloying elements Zr, Mo and Ag. The corrosion current (ICorr) of the Ti50Zr25Cu5Mo10Ag6Sn3Si1 alloy (43.28 nA) was lower compared to the corrosion current of the Ti50Zr15Cu20Mo7Ag4Sn3Si1 and Ti6Al4V samples (133.9 and 92.41 nA, respectively) in Hank's solution, hence the Ti50Zr25Cu5Mo10Ag6Sn3Si1 alloy showed better corrosion resistance.