Analysis of the Crystallogeometry of Tetragonal Martensite in Indium‒Cadmium Alloys by the Method of Electron Back-Scattering Diffraction

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Electron back-scattering diffraction shows that a package structure consisting of colonies of tetragonal lamella plates is formed when cooled below the temperature of the martensite fcc→fct transformation in the In–4.5 wt % Cd alloy. On the basis of the data obtained, it can be concluded that the package structure consisting of twin plates and the structure of a separate martensite plate consisting, in turn, of submicrotwins obeys general laws. At each structural level, in the group of neighboring regions, structural elements of three types, which differ in the direction of the tetragonality axis, are found.