Glasslike behavior in a nanostructured Fe/Cu alloy
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Communications Glasslike Behavior in a Nanostructured Fe/Cu Alloy J.E. CARSLEY, W.W. MILLIGAN, S.A. HACKNEY, and E.C. AIFANTIS In this article, we report the observation of shear bands and perfectly plastic behavior, typical of metallic glasses, in an Fe-Cu alloy with grain sizes in the 100 nm range. A strengthening effect with decreasing grain size was also observed, and the shear bands occurred on planes oriented at about 40 deg from the tensile axis instead of the maximum shear plane of 45 deg, as has been observed in amorphous polymers. Fe-Cu alloys containing 10 wt pct copper were prepared by ball milling of iron (99.9 pct) and copper (99.5 pct) powders in a Svegari attritor system. 440C hardened stainless steel media (6.75 mm diameter) were used at a weight ratio of 10:1. To limit contamination, the system was contained in an argon glove box with controlled moisture (0.03 ppm) and oxygen (
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