| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Algorithms Development in Materials Science and Engineering
|
| Presentation Title |
Developing a stress-senstive nucleation model beyond classical nucleation theory |
| Author(s) |
Khanh Dang, Laurent Capolungo |
| On-Site Speaker (Planned) |
Khanh Dang |
| Abstract Scope |
Engineering metals and alloys are subjected to diverse thermal and mechanical loads during manufacturing and in service. While successfully capturing the effects of chemical composition and temperature on nucleation kinetics and driving forces, simple classical nucleation theory (CNT) models cannot efficiently capture the effects of applied and local stresses on the nucleation process. Specifically, a common approach to include the effects of pressure in the CNT models is to add a “correctional” pressure-dependence energy term to the total free energy of the system, which relies on the availability of experimental data. In the proposed work, a stress-sensitive nucleation model is developed by extending the CNT model on three fronts: activation energy barrier, kinetic factor, and numerical approach. Specifically, the effects of stress on energy barriers will be determined using Eshelbian micromechanics model. This nucleation model is applied to Fe-Cr and Al-Cu systems with simple and complex precipitation sequences, respectively. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Phase Transformations, Modeling and Simulation |