Effect of precipitates on microstructures and properties of forged Mg-10Gd-2Y-0.5Zn-0.3Zr alloy during ageing process

- The effect of forging process on microstructure evolution and mechanical properties of Magnesium alloy with rare earth was investigated.
- The optimal mechanical properties of the alloy with high strength and enough elongation were obtained after forging and ageing process.
- The strength improvement of the alloy after forging and ageing process mainly results from the precipitation of 14H-type LPSO phase.
- Strengthening mechanism of the alloy is controlled by the precipitation of β′ and 14H-type LPSO phases which can inhibit sliding of dislocations and growth of grain boundaries.