About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Algorithm Development in Materials Science and Engineering
|
Presentation Title |
Understanding the Effects of Stresses on Precipitation: Beyond Classical Nucleation Theory |
Author(s) |
Khanh Dang, Laurent Capolungo |
On-Site Speaker (Planned) |
Khanh Dang |
Abstract Scope |
Precipitate nucleation is rationalized using classical nucleation theory and regular solid solutions for complex alloys. While successful in capturing the effects of chemical composition and temperature on nucleation kinetics and driving forces, simple nucleation models cannot comprehensively capture the effects of local stresses on the nucleation process. Specifically, previous approaches rely on experimental data to quantify a “correctional” pressure-dependence energy which is added to the total free energy of the system. In the proposed work, a new framework is developed to systematically quantify the effects of local stress on both (1) the elastic strain energy (sensitive to the phase and local composition) and, (2) the transformation strain energy (related to the eigenstrain required for the formation of the precipitates). The framework is applied to the case of stainless steel (SS) 316 with the carbide precipitate, M23C6. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, Mechanical Properties |