Dynamic Model of Spatial Scaling of the Initial Excited State upon Reconstructive Martensitic Transformations

Abstract

Abstract: In the dynamic theory of martensitic transformations, the possibility of rapid spatial scaling of the excited state, accompanied by an increase in the transverse size of the region of the initial excited state, was postulated. In this work, it is shown that this postulate corresponds to the process of propagation of a cylindrical wave, which makes it possible to translate information on the type of threshold strain from the nanoscale to the micron level. This model allows one to give a qualitative description of not only the completely twinned midrib of lenticular crystals, but also the partially twinned zone framing the midrib. Another fundamental conclusion is made about the martensitic transformation of austenite nanograins as a whole during the propagation of a cylindrical wave. © 2021, Pleiades Publishing, Ltd.