| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Modelling the Spatial Evolution of Excess Vacancies and Its Influence on Age Hardening Behaviors in Multicomponent Aluminium Alloys |
| Author(s) |
Xuezhou Wang, Dongdong Zhao, Yijiang Xu, Yanjun Li |
| On-Site Speaker (Planned) |
Xuezhou Wang |
| Abstract Scope |
Excess vacancies play crucial roles in the precipitation of age-hardening precipitates in aluminium alloys. A finite volume numerical model has been developed to simulate the temporal evolution and spatial distribution of non-equilibrium excess vacancies during NA and AA in multicomponent aluminium alloys. In the model, the annihilation mechanisms of vacancies at GBs and dislocations have been rigorously treated while the effect of solute trapping on vacancy evolution has been well addressed. The model has been applied to understand the influences of quenching mode, NA, temperature of AA, grain size, number density of dislocations and alloy chemistry on the experimentally observed precipitation and age hardening kinetics of heat-treatable aluminium alloys. This model will help to reach a deeper understanding of the roles of excess vacancies in precipitation kinetics and therefore is important to further optimize thermomechanical processing parameters and alloy composition to improve the mechanical properties of age-hardening aluminium alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Phase Transformations, Modeling and Simulation |