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 ۴ mm diameter mold. The evaluation of the results showed that the Ti۵۰Zr۱۵Cu۲۰Mo۷Ag۴Sn۳Si۱ metallic glass has a composite structure of dispersed crystalline phases (α-Ti, β-Ti and Ti۲Cu) in a glassy field. However, the Ti۵۰Zr۲۵Cu۵Mo۱۰Ag۶Sn۳Si۱ alloy has a higher glass formation ability (GFA) and the crystalline phases formed in the Ti۵۰Zr۱۵Cu۲۰Mo۷Ag۴Sn۳Si۱ alloy disappeared with increasing the amount of alloying elements Zr, Mo and Ag. The corrosion current (ICorr) of the Ti۵۰Zr۲۵Cu۵Mo۱۰Ag۶Sn۳Si۱ alloy (۴۳.۲۸ nA) was lower compared to the corrosion current of the Ti۵۰Zr۱۵Cu۲۰Mo۷Ag۴Sn۳Si۱ and Ti۶Al۴V samples (۱۳۳.۹ and ۹۲.۴۱ nA, respectively) in Hank's solution, hence the Ti۵۰Zr۲۵Cu۵Mo۱۰Ag۶Sn۳Si۱ alloy showed better corrosion resistance.

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Keyword: Ti-Bulk metallic glasses ، Glass formation ability ، Corrosion behavior