Hot deformation microstructure of aluminum sheets prepared by different melt-treatments used for eas

Compression test at elevated-temperature of aluminum sheets used for easy-open can prepared by different melt-treatment were carried out with dynamic thermal/mechanical simulation experimental technique.And the feature of hot deformation microstructure of the sheets was studied preliminarily by opitical microscope, transmission electron microscope.The results show that the metallurgical quality of the sheets influences dynamic recrystallization.Dendrite net-cells exist in the sheets prepared without melt-treatment or by routine melt-treatment and the distribution of grain size is non-uniform;dynamic Recrystallization occurs easily by means of subgrain merging at the lower temperature in the sheet prepared by high-efficiency melt-treatment,and the tiny and evenly distributed grains can be obtained under the wider hot deformation condition.It is the ideal hot deformation condition that the sheet prepared by high-efficiency melt-treatment is deformed at 573673K with the strain rate of 0.11.0s~(-1) and the strain of 0.7.