Study of {111}α Precipitate Plates in Al-Cu-Mg-Ag and Al-Cu-Li-Mg-Ag Alloys

Al-Cu-Mg-Ag and Al-Cu-Li-Mg-Ag alloys exhibit high to ultra-high yield strength and exceptional creep performance at ambient and elevated temperatures. The superior properties are attributable to a dense and uniform distribution of Ω and T1 precipitate plates in the alloy microstructure. Despite the numerous studies made in the past, there are still debates on the structure and formation mechanisms of Ω and T1. This project aims to address these debates. The project's outcomes provide a deeper understanding of the structure and formation mechanisms of Ω and T1 precipitates.