LAUSR

Herein, the effects of Zn/Y and Zn/Gd addition on microstructural evolution and mechanical properties of the superlight Mg–14Li‐based alloy are investigated. The results show that Mg–14Li‐based alloys are characterized by predominantly single β‐Li phase. Zn/Y addition leads to the introduction of homogeneous distribution of Mg3Zn3Y2 (W phase), Mg2Zn11, and MgLiZn phases. With the strengthening effect of grain refinement and a large number of precipitates, the mechanical properties of Mg–14Li‐based alloy are improved, whereas MgGd3, MgGd, Mg2Zn11, and GdZn5 phases appear with the addition of Zn/Gd, which enhance the Mg–14Li‐based alloy significantly due to grain refinement strengthening, the second phase strengthening, and solid solution strengthening. After hot extrusion, dynamic recrystallization (DRX) significantly refines β‐Li into equiaxed grains, and broken precipitated phases are distributed along the extrusion direction. Mechanical properties of those alloys are improved because of grain refinement and distributed precipitates.