Development of high-strength magnesium alloys via combined processes of extrusion, rolling and ageing

► Combined uses of hot extrusion, cold rolling and ageing cause a high strength. ► Denser precipitates, an intensive basal texture and refined grain make improvement. ► A high density of dislocations enhances number density of precipitates during ageing. A remarkably high tensile yield strength of 445 MPa is obtained in a Mg–14Gd–0.5Zr (wt.%) alloy when this alloy is prepared by the combined processes of hot extrusion, cold rolling and ageing. This significant improvement in strength is associated with a denser distribution of precipitates, an intensive basal texture and a refined grain size.