Effects of Fe on Structure and Mechanical Properties of Cu-Based Amorphous Alloys

Abstract:

(Cu0.46Zr0.44Al0.08Dy0.02)100-xFex amorphous alloys with x=0, 1, 3, 5, 7 were prepared by a copper mold casting method. Amorphous structure and mechanical properties of the alloys were studied by X-ray diffraction (XRD), differential scanning calorimetry (DSC), Transmission electron microscopy (TEM), universal testing machine and scanning electron microscope (SEM). The results show that appropriate Fe addition can enhance structure of the amorphous alloys. The structure of the bulk alloy is completely amorphous when the Fe content is x=1 or 3, and apparent nanoscale phase separation occurs in the as-prepared alloys. When x=3 the alloy possesses large compression strength (1835 MPa) and plastic deformation (0.5%).

Key words:Cu-based amorphous alloy; element addition; phase separation; mechanical properties