Microstructures and mechanical properties of Mg-Ce-Zn-Zr wrought alloy

Abstract

Microstructures and mechanical properties of Mg-2.0%Ce-0.7%Zn-0.7%Zr alloy were studied. The results of scanning electron microscopy show that Mg₁₂Ce phase mainly distributes at the grain boundaries. The fine Mg₁₂Ce phase can apparently elevate recrystallization temperature by preventing the grain boundary migration. No dynamic recrystallization occurs during the hot-extrusion. The mechanical properties of as extruded specimens are σ_b=278.5 MPa, δ=12.0%, while those of the specimens annealed at 250 °C for 100 h are σ_b=272.6 MPa, δ=11.3%, which indicate that the alloy has good mechanical properties at room temperature.

Keywords

wrought magnesium alloy / microstructure / mechanical property / hot-extrusion / dynamic recrystallization