DEFORMATION BEHAVIOR AND FRACTOGRAPHIC FEATURES OF DUCTILE Cu47Zr47Al6 BULK METALLIC GLASS

Cu47Zr47Al6 bulk metallic glass rods of 2 mm diameter (Phi) are prepared by arc-melting and in-situ suction casting. The compressive deformation behavior under quasi-static conditions of the as-cast amorphous alloy exhibits a high yield strength (1600 - 1800 MPa) combined with significant plastic deformation (up to 5%). The fracture surfaces of the deformed samples consist of a mixture of vein-like patterns, river-like patterns and smooth regions. The area covered by vein-like patterns decreases when the ductility of the material increases. Protuberances, which interact strongly with the shear bands, are found at the surface of the deformed specimens.