Processing of an experimental aluminum-lithium alloy for controlled microstructure

摘要

This paper describes the processing route that was used to obtain unrecrystallized and recrystallizedmicrostructural versions of an experimental Al Li alloy. The alloy, designated AF/C-489, has anominal chemical composition of Al-2.05 Li-2.7 Cu-0.3 Mg-0.6 Zn-0.3 Mn-0.04 Zr (weightpercentage). Processing schemes to obtain unrecrystallized and recrystallized conditions of the Al Liplate were obtained by performing dynamic material modeling. Dynamic material modeling involvedcompression testing over strain rates ranging from 0.05 to 10 s{sup}-1 and temperatures rangingfrom 300 to 550℃ and generating a processing map. Rolling parameters were obtained by using theconstitutive equations obtained from dynamic material modeling as input to the finite-element analysiscode.