Cold rolling and annealing treatment were carried out for the hot extrusion LA141Mg-Li alloy

and effects of cold rolling deformation and annealing process on microstructure and mechanical properties of the rolled sheet were investigated.The results show that

hot extrusion LA141 magnesium lithium alloy can be cold rolled with a large deformation rate

and the maximum deformation rate reaches more than 95%.With the increase of deformation rate

the tensile strength is increased to 253.42 MPa due to the work hardening and grain refinement

while the elongation is increased and then decreased due to different grain refinement effect.After annealing treatment

recovery and recrystallization occur

which results in the decrease of the tensile strength.After annealing treatment at 250 ℃for 1h

the alloy is recrystallized completely

so grain size is refined

and strength and elongation of the alloy are improved as a result of occurrence of complete recrystallization.