The Effect of Thermomechanical Processing Sequence on the Dispersoid Distribution and Final Mechanical Properties of Spray-Formed Al-Cu-Li Alloy

Controlling the formation of ?? (Al3Zr) phase is pivotal for regulating recrystallization and thus mechanical properties spray formed 2195 (Al-Cu-Li) alloy. In a conventional “homogenization-extrusion” process, precipitation severely affected by presence T1(Al2CuLi) in as-deposited alloy, leading to an inhomogeneous distribution phase. present work, we propose new thermomechanical processing (TMP)—swapping order homogenization extrusion processes. The microstructures proposed TMP were systematically studied at various stages alloy treatment compared with out TMP. It was revealed that introduction process on can break continuous network primary phases dissolve T1 phase, promoting uniform during subsequent two-step homogenization. During solution treatment, more effectively suppressing coarse grain layer sheet surface, while after final peak aging, produces lower strength but higher elongation, due mainly smaller thickness reduction deformation. technique provides insight into Al-Cu-Li alloys.