Effect of Plastic Deformation on the Kinetics of Precipitation in an Aluminum Zinc Alloy (5. 6 at. % Zn) at Different Stages of Guinier-Preston Zone Formation.

In different series of investigations specimens of the Al-Zn alloy were homogenized at 400 C, quenched in liquid nitrogen, and immediately rolled at minus 195 C. Electric resistivity, as a measure of recovery and precipitation, was then measured during heating from minus 195 to 400 C. Parallel tests were performed on specimens aged (at different temperatures and times) between quenching and rolling with different reductions. Results were plotted.