The Structure Transformations in Mechanically Alloyed Fe-Mn and Fe-Co Composition

Fe-Mn and Fe-Co alloys were prepared by the method of mechanical alloying (MA) of elemental powders in high-energy planetary ball-milling in a wide concentration range of components. The phase compositions of MA samples of both systems were similar to those existing according to the equilibrium phase diagrams, but the concentration ranges of existence of single-phase solid solutions were markedly extended. High concentrations of the stacking faults in the alloys with the fcc structure were observed. Kinetics of the structure transformations at the MA is investigated for the Fe50Mn50 alloy. The dependence of the hyperfine magnetic field on the alloy concentration is investigated for the Fe-Co system. (Author)