Superplastic flow in Zn-22wt

摘要

The sigmoidal relationship between stress and strain rate that has been reprted for micrograin superplastic alloys is characterized by the presence of three regions: region I (the low-stress region), region II( the intermediate-stress region or the superplastic region, where ductility is maximum), and region III (the high-stress region). Recent results on the superplastic Zn-22