Low beryllium content Zr-based bulk metallic glass composite with plasticity and work hardenability

摘要

A modified Zr-based bulk metallic glass matrix composite Zr_(47.67)Cu_(40)Ti_(3.66)Ni_(2.66)Be_6 has been produced by increasing the contents of elements of Zr and Cu with higher Poisson ratio and reducing the contents of Ti, Ni, and Be elements with lower Poisson ratio based on famous metallic glass former Vitreloy 1. A compressive yielding strength of 1804 MPa, fracture strength of 1938 MPa and 3.5% plastic strain was obtained for obtained metallic glass composite. Also, work-hardening behavior was observed during compressive experiment which was ascribed to the interaction of the in situ precipitated CuZr phase and shear bands.