Quantitative study of the solute clustering and precipitation in a pre-stretched Al-Cu-Mg-Ag alloy

The effect of 2.5% pre-stretching on the solute clustering and subsequent precipitation of an initial aged Al-Cu-Mg-Ag alloy is investigated by quantitative transmission electron microscopy (TEM) and atom probe tomography (APT) technique. In present work, 2.5% pre-stretching is found to restrict the dense precipitation of Ω phase, leading to the slower age-hardening response at 180 °C. The dominant Mg-Ag co-clustering, as revealed in...