Cryogenic treatment-induced martensitic transformation in Cu–Zr–Al bulk metallic glass composite

A martensitic phase transformation from the B2 to the B19’CuZr phase in the Cu–Zr–Al bulk metallic glass (BMG) composite was induced by cryogenic treatment (CT). The martensitic transformation causes the improvements of the microhardness and the ultimate compression fracture strength. When the cryogenic treatment time was 72 h, the microhardness and the ultimate compression fracture strength of the BMG composite increased about 18.55% and 37.5%, respectively.