Electron diffraction at thin plates of ε- martensite

By the methoi of electron microscopy and electron diffraction, the structure of the alloy Fe - 20 at. % Ru after quenching from 900°C is determined. It is shown that the alloy consists of alternating thin layers of the matrix and e martensite. Such a morphology of a twophase alloy leads to the expansion of points of the inverse lattice and, consequently, to the appearance of extra reflexes and also reflexes from double diffraction, resembling diffraction from a modulated structure, on the electron-microscope traces.