Physical nature of fcc-bcc martensitic transformation in iron based alloys

TL;DR

This paper explores the physical mechanisms behind fcc-bcc martensitic transformation in iron alloys, emphasizing wave-controlled growth and nucleation processes, and introduces models involving lattice displacement waves and cryston concepts.

Contribution

It presents a novel physical model explaining martensite formation through lattice displacement waves and the cryston model, linking nucleation and growth processes.

Findings

Growth of martensite crystals is controlled by quasi-longitudinal lattice displacement waves.

Heterogeneous nucleation and wave growth are interconnected in martensitic transformation.

Strain martensite formation is explained via the cryston model.

Abstract

The summary of the models offered by the author revealing features of the physical mechanisms controlling processes of martensite crystal formation is resulted. The rapid growth of a cooling martensite crystal is considered as a self-organized process controlled by the quasi-longitudinal lattice displacement waves (DW). It is shown, that processes of the heterogeneous nucleation and wave growth have the genetic connection in case of spontaneous fcc-bcc martensitic transformation. The exposition of strain martensite formation is considered in the context of a cryston model.