Extraordinary high-strain rate superplasticity of severely deformed Al-Mg-Sc-Zr alloy

Superior superplastic behavior with elongations from 3000 to 4100% were found in temperature range of 400-475 °C at strain rates 10−2-10−1 s−1 for the severely deformed Al-5Mg-0.18Mn-0.2Sc-0.08Zr-0.01Fe-0.01Si alloy having homogeneous and thermally stable ultrafine-grain structure with ∼1 μm grain size and low amount of coarse excess phases.