2001/08/27 by K. D. Belashchenko, I. R. Pankratov, German Samolyuk +2 · 1 citation
Engineering · Physics and Astronomy · #Advanced Chemical Physics Studies #High Temperature Alloys and Creep #Intermetallics and Advanced Alloy Properties #cond-mat.mtrl-sci
paper · pdf · doi:10.1088/0953-8984/14/3/325
published as J. Phys.: Condens. Matter 14, 565 (2002). · 20 pages, 11 figures (figures are better in PS than in PDF). Submitted to J. Phys.: Condens. Matter
arxiv created 2001/08/27 · openalex publication_date 2001/12/24 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
The earlier-developed master equation approach and kinetic cluster methods are applied to study the kinetics of L1 0 -type orderings in alloys, including the formation of twinned structures characteristic of cubic-tetragonal-type phase transitions. A microscopical model of interatomic deformational interactions is suggested which generalizes a similar model of Khachaturyan for dilute alloys to the physically interesting case of concentrated alloys. The model is used to simulate A1→L1 0 transformations after a quench of an alloy from the disordered A1 phase to the single-phase L1 0 state for a number of alloy models with different chemical interactions, temperatures, concentrations, and tetragonal distortions. We find a number of peculiar features in both transient microstructures and transformation kinetics, many of them agreeing well with experimental data. The simulations also demonstrate the phenomenon of an interaction-dependent alignment of antiphase boundaries in nearly equilibrium twinned bands which seems to be observed in some experiments.