Achieving enhanced mechanical properties in Mg-Gd-Y-Zn-Mn alloy by altering dynamic recrystallization behavior via pre-ageing treatment

The effects of pre-ageing treatment on the microstructure and mechanical properties of the Mg-9.2Gd-4.4Y-1.0Zn-0.8Mn (wt.%) alloy were investigated. Microstructural analysis indicated that the ageing treatment before extrusion led to the formation of dense prismatic β′ and basal γ′ precipitates in heat treated alloys. The presence of these precipitates and their solution obstructed the dynamic recrystallization process during hot extrusion. The...