First principles of calculation of the energy of mixing and magnetic moments of components of alloys Fe-Mn, Fe-Cr and Fe-Ni with BCC and FCC lattices

The concentration dependence of mixing energy and magnetic moments on the atoms of components in fee and bec solid substitution solutions of manganese, chromium and nickel in iron. It was established that mixing energy in the a-and ry-solutions not only have different values, but also the sign. It is shown that for a-solid solution near 10 % Cr and 1,5 % Mil there is thermodynamic anomaly -changing the concentration dependence of the mixing energy.