Interface reorientation during coherent phase transformationsV. 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