Tensile properties of Cr inserted amorphous Co₈₅Zr₉Nb₆ films deposited on polymer substrate

Amorphous Co₈₅Zr₉Nb₆ films with inserted Cr layer were deposited on polyethylene terephthalate (PET) substrate. After the Cr layers were inserted, tensile strengths calculated from stress-strain curves were found to be enhanced; the elastic regions were shortened, while the plastic regions were extended. Surface morphology examination after strain revealed cracks oriented at an angle of about 60° to the tensile direction when the Cr layer is introduced. The shear bands distribute around the cracks and rotate relative to the cracks.