Effect of precipitation on strength and ductility in a Mg-Zn-Y alloy

► Strain and ageing used to control β1′ precipitate size and distribution. ► Precipitate size and distribution are correlated with strength and ductility. ► Larger volume fraction of β1′ precipitates introduced by solute re-partitioning. ► 32% increase in yield strength achieved by 5% pre-ageing deformation.