The mechanical properties of melt-spun of Fe{sub}(78-x)Cr{sub}xSi{sub}10B{sub}12 amorphous alloy wires are compared with those of HT steel wires. Fracture toughness was measured for melt spun ribbon. A new double-pulley tensioning machine has been developed to facilitate tension/compression fatigue testing of the Fe{sub}(78-x)Cr{sub}xSi{sub}10B{sub}12 amorphous alloys and the HT steel wires. Some tension/tension fatigue testing was also performed using a single pulley testing machine. The tensile strength and microhardness increased and the fatigue performance improved with the substitution of Fe by Cr. The fatigue performance of the glassy alloys was generally similar when expressed on the basis of bend strain but inferior when expressed on the basis of bend stress. Fracture toughness was largely independent of Cr content. Fractography revealed differences in the fracture surface features for the amorphous wires tested in the two different modes.
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