| Автор | K D Belashchenko |
| Автор | V Yu Dobretsov |
| Автор | I R Pankratov |
| Автор | G D Samolyuk |
| Автор | V G Vaks |
| Дата выпуска | 1999-12-20 |
| dc.description | The earlier-described master equation approach to configurational kinetics of non-equilibrium alloys is applied to study L1<sub>2</sub>-type orderings in FCC alloys. We describe the kinetic tetrahedron cluster-field method which generalizes a similar method used for equilibrium systems to the case of non-equilibrium alloys. The method developed is used to simulate A1 L1<sub>2</sub> and A1 A1+L1<sub>2</sub> transformations after a quench of an alloy from the disordered A1 phase to the single-phase L1<sub>2</sub> state or the two-phase A1+L1<sub>2</sub> state for a number of alloy models with both short-range and long-range interactions. Simulations of the A1 L1<sub>2</sub> transition show a sharp dependence of the microstructural evolution on the type of interaction, and particularly on the interaction range. The simulations also reveal a number of peculiar features in both the transient microstructures and the transformation kinetics, many of them agreeing well with experimental observations. Microstructural evolution under A1 A1+L1<sub>2</sub> transition was found to be less sensitive to the type of the finite-range (`chemical') interaction, while in the presence of elastic interaction this evolution shows a number of specific features which were earlier discussed phenomenologically by Khachaturyan and co-workers and are illustrated by our simulations. We also consider the problem of the occurrence of a transient congruent ordering under A1 A1+L1<sub>2</sub> transformation and discuss the microstructural features of this stage. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | The kinetic cluster-field method and its application to studies of L1<sub>2</sub>-type orderings in alloys |
| Тип | paper |
| DOI | 10.1088/0953-8984/11/50/343 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 11 |
| Первая страница | 10593 |
| Последняя страница | 10620 |
| Аффилиация | K D Belashchenko; `Kurchatov Institute' Russian Research Centre, Moscow 123182, Russia |
| Аффилиация | V Yu Dobretsov; `Kurchatov Institute' Russian Research Centre, Moscow 123182, Russia |
| Аффилиация | I R Pankratov; `Kurchatov Institute' Russian Research Centre, Moscow 123182, Russia |
| Аффилиация | G D Samolyuk; `Kurchatov Institute' Russian Research Centre, Moscow 123182, Russia |
| Аффилиация | V G Vaks; `Kurchatov Institute' Russian Research Centre, Moscow 123182, Russia |
| Выпуск | 50 |
