Physics – Condensed Matter – Materials Science
Scientific paper
2006-01-25
Physics
Condensed Matter
Materials Science
217 pages, 45 figures
Scientific paper
This book is the first monograph in the scientific literature, dedicated to the FCC-BCC transformation in iron-based alloys, in which the dynamical approach is used for the explanation of the martensite growth stage. The rapid growth of a cooling martensite crystal is considered as a self-organized process controlled by the quasi-longitudinal lattice displacement waves (DW). The regime of the DW initial excitation is rigid. DW have the frequencies ~$10^{10} sec^{-1}$ from the hypersound band and the amplitudes providing the level of deformation ~$10^{-3}$. The conditions that are necessary for the generation of DW by non-equilibrium d-electrons are analyzed. A wide range of questions (from peculiarities of the electronic spectrum to macroscopic morphological indicators), connected with the physical interpretation of the FCC-BCC martensitic transformation in iron-based alloys, is discussed. The short review of results having fundamental meaning for the creation of a physical model describing the martensite nucleation process is given in the monograph's conclusion. It is shown, that processes of the heterogeneous nucleation and wave growth have the genetic connection to the FCC-BCC martensitic transformation. The short review of the last author's results revealing features of the physical mechanisms controlling processes of martensite crystal formation for all alternatives of the FCC-BCC martensitic transformation is given in the monograph's epilogue.
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