Be Effect on Glass-Forming Ability and Mechanical Properties of Ti-Cu-Co-Zr-Sn Bulk Metallic Glasses

Abstract

A series of Ti₄₄Cu_44−xCo₄Zr₆Sn₂Be_x bulk metallic glasses with x=0–5.1 has been systematically investigated in terms of glass-forming ability and mechanical properties at room temperature. With the small amount of Be addition, the glass forming ability as well as ductility can be significantly increased leading to the fully amorphous rod having the diameter larger than 4 mm and ductility larger than 10%. Upon compressing the bulk metallic glass Ti₄₄Cu_38.9Co₄Zr₆Sn₂Be_5.1, a work hardening-like behavior that may be attributed to structural heteorgeniety was observed.