Local approach for coarsening of precipitates

0525052 - ÚFM 2021 RIV GB eng J - Journal Article
Svoboda, Jiří - Shan, Y. V. - Zickler, G. A. - Kozeschnik, E. - Fischer, F. D.
Local approach for coarsening of precipitates.
Scripta Materialia. Roč. 178, MAR (2020), s. 232-235. ISSN 1359-6462. E-ISSN 1872-8456
R&D Projects: GA ČR(CZ) GA17-01641S
Institutional support: RVO:68081723
Keywords : grain-growth * stress-relaxation * model * kinetics * diffusion * alloys * Coarsening * Bulk diffusion * Kinetics * Thermodynamics * Precipitate interactions
OECD category: Thermodynamics
Impact factor: 5.611, year: 2020
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S1359646219306840?via%3Dihub

Coarsening of precipitates is very often treated by the classical Lifshitz-Slyozov-Wagner (LSW) mean-field coarsening theory. The theory provides simple evolution equations for volumes of precipitates. A new model based on application of the Thermodynamic Extremal Principle extends the LSW theory by terms accounting for mutual interaction of individual precipitates during coarsening. The model is demonstrated on an example showing that only one interaction term is dominant, which leads to a set of linear equations with a non-diagonal matrix for the rates of precipitate volumes. Of course, the set of equations must be solved numerically. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Permanent Link: http://hdl.handle.net/11104/0309266