A phonon theory of precursor phenomena in martensitic phase transformations is developed. Extending Gr\"uneisen theory of thermal expansion, this theory addresses the effects of deformation-dependent low-energy phonons on the structural, thermal, and elastic behaviors of pre-martensitic cubic crystals that undergo incomplete phonon softening. It reveals spontaneous symmetry breaking, pre-martensitic transformation, phonon domains, and tweed structure. The theory naturally explains the ubiquitous pre-transitional anomalies that are difficult to explain from conventional phase transition theories.
@article{arxiv.1412.3725,
title = {Phonon Theory of Martensitic Transformation Precursors},
author = {Yongmei M. Jin and Yu U. Wang},
journal= {arXiv preprint arXiv:1412.3725},
year = {2014}
}
Comments
11 pages, 3 figures, submitted to Physical Review Letters on August 9, 2014