Abstract
Iron and Aluminium elemental powders mixed in the atomic ratio Fe 50Al 50 and Fe 75Al 25 have been alloyed using an high energy mill system. The structural transformation of the milled products has been followed using XRD techniques. Samples obtained from cold-consolidation of the milled powders have been used for Elastic Energy Dissipation measurements (IF) and analysed in the temperature range 300–980 K. The XRD spectra corresponding to specimens milled for long times reveal the formation of the FeAl and Fe 3Al nanostructured intermetallic compounds. The IF spectra show two relaxational damping peaks P 1,P 2 in the temperature range 600–980 K. The peak evolution for different milling treatments indicates a Zener and a grain-boundary relaxation mechanisms for P 1 and P 2 respectively.
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