An application of the localized soft mode theory for martensitic transformations

1 January 1977

journal article
research article
Published by Taylor & Francis in Ferroelectrics

Vol. 16 (1) , 89-91
https://doi.org/10.1080/00150197708237125

Abstract

It is suggested that the heterogeneous nucleation of martensitic phase transformations occurs as a result of dynamic lattice instabilities forming near planar lattice defects. It is shown that the anharmonic terms of the elastic free energy as measured for Li, Na and βCu-Zn can be used to predict phonon soft mode instabilities at lattice strains of the order of a few per cent. It is argued that this localized soft mode instability will then propagate through the lattice under favorable conditions. Several experimental tests are proposed.

Keywords

This publication has 2 references indexed in Scilit:

Second-, third-, and fourth-order elastic constants of $β$ -brass
Physical Review B, 1975
A Localized Soft Mode Theory for Martensitic Transformations
Physica Status Solidi (b), 1973