Volume 78, Number 1, April 2007
Article Number 16003
Number of page(s) 5
Section Condensed Matter: Structural, Mechanical and Thermal Properties
Published online 19 March 2007
EPL, 78 (2007) 16003
DOI: 10.1209/0295-5075/78/16003

Interface reorientation during coherent phase transformations

V. I. Levitas1, I. B. Ozsoy1 and D. L. Preston2

1  Texas Tech University, Mechanical Engineering Department - Lubbock, TX 79409, USA
2  Physics Division, Los Alamos National Laboratory - Los Alamos, NM 87545, USA

received 7 December 2006; accepted in final form 21 February 2007; published April 2007
published online 19 March 2007

The universal thermodynamic driving force for coherent plane interface reorientation (IR) during first-order phase transformations (PT) in solids is derived. The relation between the rates of IR and interface propagation (IP) and the corresponding driving forces are derived for combined athermal and drag interface friction. The coupled evolution of IR and IP during cubic-tetragonal and tetragonal-orthorhombic PTs under three-dimensional loading is studied. An instability in the interface orientation is shown to have the features of a first-order PT.

64.60.-i - General studies of phase transitions.

© Europhysics Letters Association 2007