Investigation of the Hot Deformation Behavior of an Al-Mg-Sc-Zr Alloy under Plane Strain Condition

Abstract

This study investigates the hot deformation behavior of a new Al-Mg-Sc-Zr alloy under plane strain conditions. Flow curves corrected for deformation heating were calculated for strain rates between 0.01 and 10s-1 in a temperature range of 200 to 400°C. To evaluate the deformation behavior, strain rate sensitivity as well as flow localization parameter maps were calculated for strains of 0.2, 0.4, and 0.6. In addition, microstructural investigations and hardness measurements were performed for selected samples. It was shown that the flow stress decreased with deacreasing strain rate and increasing temperature. The best formability was observed for high strain rates and low temperatures as well as for low strain rates and high temperatures. In these cases no flow instabilities were observed.

Influence of Al3(Sc,Zr) Precipitates on Deformability and Friction Stir Welding Behavior of Al-Mg-Sc-Zr Alloys

“…In addition, we showed that precipitates influenced the materials behavior during hot deformation [12]. Based on the outcome of the fundamental investigations mentioned above, the present study shows more practical aspects of the complex interactions occurring during processing of the given AlMg4Sc0.4Zr0.12 alloy.…”