Low-temperature superplasticity of extruded Mg–Sn–Al–Zn alloy

The tensile properties of extruded Mg–Sn–Al–Zn alloy at elevated temperature were investigated. Low-temperature superplasticity was found in the alloy, which exhibited tensile elongations of 410–950% at strain rates in the range 1 × 10−3–1 × 10−4 s−1 at 473 K. The superplastic deformation behavior was attributed to the fine-grained microstructure, which contained thermally stable Mg2Sn precipitates.