Ag-containing Al-Zn-Mg-Cu alloy with low Zn/Mg ratio

Superior age-hardening

Minor Ag addition refines and promotes co-precipitation of strengthening T′ and η′ phases, improving peak-aged tensile strength without sacrificing elongation.

Zhu, Qianqian · Xiao-Dong, Wu · Cao, Lingfei · Zou, Yan · Song, Hui · Liu, Yahui · Song, Kexing · Couper, M. J.

Journal of Materials Science and Technology 2024

Advantages

Improved peak-aged tensile strength

Hardness remains higher than Ag-free alloy after 1000 h ageing

GP zones, T′, η′, η and T phases coexist after 14 d ageing