Influence of Warm Rolling Parameters (Temperature and Reheating Time Between Passes) on the Superplastic Response of Al-Mg Alloys

摘要

The effects of rolling temperature and reheating interval between consecutive rolling passes on the superplastic response of two Al-Mg alloys were investigated. The alloys were Al-8%Mg0.1%Zr and Al-10%Mg-0.1%Zr (wt. pct.). The effects of varying the process parameters were observed on resultant superplastic ductility during testing at 300 C. The data support a model for microstructure evolution during processing by a mechanism of continuous recrystallization (CRX). The model for CRX assumes that dislocations recover to sub boundaries which are stabilized by precipitates, of size on the order of one micron, located at nodes of the substructure. Continuous recrystallization, Superplasticity, Reheating interval rolling temperature. (jes)