Structural and Phase Transformations Occurring during Preparation of Ordered Ternary Fe–Al–M Alloys (with M = Ga, B, V, and Mn) by Mechanical Alloying

The possibility of synthesis of the ordered ternary Fe 65 Al 35 – x М x and Fe 65 – y Al 35 M y alloys with x , y = 0, 3, 5, 10 at % and M = B, Ga, V, Mn is studied and conditions of the synthesis are reported. Nanocrystalline metastable disordered ternary alloys are used as the precursor materials for the ordered alloys, which are prepared by mechanical alloying from elemental components. The heat treatment of mechanically alloyed compositions allowed us to reach the single-phase state with the В 2 superstructure for the compositions with Ga and V; the single-phase state with the D 0 3 superstructure was reached for the compositions with B and Mn. Keywords: ordered ternary Fe–Al-based alloys, mechanical synthesis, structure, hyperfine interactions