Achieving ultra-strong Magnesium–lithium alloys by low-strain rotary swaging

Severe plastic deformation (SPD) with strain significantly larger than one is effective to strengthen metals and alloys. However, such a method will not work for Mg alloys due their low deformability. In view of this problem, we propose new alloy strengthening scheme low-strain deformation, which introduce massive twins stacking faults in coarse grain interior by rotary swaging (RS) at room temperature. By using scheme, successfully prepared an ultra-light bulk Mg-Li strength record.