Abstract: The structural evolution of the blended powders indicates the formation of ordered Fe3Al solution, revealed by XRD pattern, DSC trace and weaker diffraction spot in selected area diffraction (SAD). The cause of superlattice diffraction peaks invisible in XRD pattern is presented combining the diffraction rulers’ analysis of various phases. The ultimate grain size, achieved by mechanical alloying, is governed by the relation of plastic deformation and recovery during ball milling.

Key words: Fe3Al solution, Mechanical alloying, Structural evolution, X-ray diffraction