|About this Abstract
||2011 TMS Annual Meeting & Exhibition
||Aluminum Alloys: Fabrication, Characterization and Applications
||Forming Limit Diagrams for AA5182 after Preform Annealing
||Jingjing Li, John Carsley, Theresa Lee, S. Jack Hu
|On-Site Speaker (Planned)
Preform Annealing is a process of forming aluminum sheet panels in which a blank is partially stamped, heat treated and then stamped to the final desired shape. Because strain from the first deformation event is recovered by annealing, the process significantly improves product formability. The effects of prestraining along different strain paths and subsequent annealing on the ultimate forming limits of aluminum alloy 5182-O were investigated by determining forming limit diagrams (FLDs) using digital image correlation (DIC) and circle grid analysis (CGA). Aluminum panels were prestrained in uniaxial, equibiaxial and plane strain tension at 15 and 20% equivalent strains, perpendicular to the rolling direction; and annealed at 350°C for short (10 seconds) and long (20 minutes) durations. Calculations of total effective forming limit curves (FLC) were compared to experimental CGA and DIC results. The improvement in FLCs shows the advantage of annealing that can extend the formability of strained materials.
||Planned: A print-only volume