Effect of cold plastic deformation prior to ageing on creep resistance of an Al-Cu-Mg-Ag alloy

Effect of thermomechanical processing on creep resistance at 150°C of an Al-5.6Cu- 0.72Mg-0.5Ag-0.32Mn-0.17Sc-0.12Zr (wt. %) alloy was examined. It was shown that increasing strain prior to artificial aging provides achieving high strength. However, a degradation of the creep resistance, i.e., significant decrease in the rupture time and increase in the minimal creep rate, took place, concurrently. The effect of cold rolling on the strength and creep resistance is discussed in relation with the strain effect on the dispersion of secondary phase