Effect of the magnitude of long-range atomic order and the size of antiphase domains on the grain structure and special grain boundary parameters in L12-superstructure alloys

It is found means of X-ray structural analysis, transmission electron microscopy, scanning electron microscopy combined with electron backscatter diffraction, and optical metallography that the reduction of the integral magnitude of the long-range atomic order in Ni₃Mn and Pd₃Fe L1₂-superstucture alloys ordered through the A1 + L1₂ two-phase region is accompanied by antiphase domains coarsening and grains fining.