| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Computational Thermodynamics and Kinetics
|
| Presentation Title |
Revisiting the Early Stages of Precipitation in Al-Cu Alloys |
| Author(s) |
Kang Wang, William A Soffa, Bi-Cheng Zhou |
| On-Site Speaker (Planned) |
Kang Wang |
| Abstract Scope |
The early stages of precipitation in Al-Cu alloys, an epitome of the ubiquitous precipitation phenomenon responsible for improved strength of alloys, is fascinating due to the complex interplay between chemical and strain energies. Much of the studies on this topic focused on the transitions from Guinier-Preston (G.P.) zones to θ' (Al2Cu). The very nature for the formation of G.P. zones, esp. their relations with the ordering / clustering tendencies under chemical and elastic interactions, remains unclear. In the current study, the structure, stability and formation of G.P. zones are examined by the combined first-principles calculations, mixed-space cluster expansion and Monte Carlo simulations. The thermodynamics for nucleation of G.P. zones are analyzed and the metastable phase diagram with the G.P. zones and θ' is constructed. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |