Complex Precipitation Sequences of Al-Cu-Li-(Mg) Alloys Characterized in Relation to Thermal Ageing Processes

Zhen Gao, Jiang-Hua Chen†, Shi-Yun Duan, Xiu-Bo Yang, Cui-Lan Wu

Fig.2 HAADF-STEM images of the alloy natural aged for 60 days, viewed along a <100>Al direction: a an overview of the precipitates, b a Cu-monolayer GPI zone, c a δ′-GPI-δ′ precipitate composite in an “anti-phase” relation