(1) Efros B.M., (2) Pilyugin V.P., (2) Patselov A.M., (3) Gladkovskii S.V.
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(1) Donetsk Physics & Technology Institute of the National Academy of Sciences of Ukraine, 72, R.Luxemburg, St., 83114, Donetsk, Ukraine
(2) Institute of Metal Physics of the RAN, 18, S.Kovalevskii, St., 620219, Ekaterinburg, Russia,
3Ural State Technical University, 19, Mira, St., 620002, Ekaterinburg, Russia
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Influence of severe plastic deformation (SPD) under pressure on structure-phase state of Fe and alloys on the basis of Fe-Mn solid solution has been studied. Alloys with wide concentration content of manganese (from 0 to 55 wt.%), having in initial state bcc, hcp and fcc (stable and metastable austenite) phases were as the objects under investigation.
The complex study of Fe and Fe-Mn-alloys structures, deformed by severe plastic deformation under pressure, including the nanocrystalline structures, by methods of transmission electron microscopy (TEM), X-ray diffraction analysis (XDA), Mössbauer effect (ME) and metallography has been carried out. There is the range of pressure (P=0.1MPa- 60GPa) and logarithmic deformation degree (e= 0-7) of studied alloys in experiments.
The obtained results of complex investigation (TEM, XDA, ME) of studied metals and alloys at nanocrystalline state have revealed the strong dependence of phase solid transformations on parameters of SPD under pressure and initial phase, structure state and concentration of Mn at alloys.

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