[S2] S2 Materials Science of Mille-feuille Structure IV (1)

[S2.7] Microstructure evolution of Mg-Sm-Gd based alloys with ultra-high hardness

*Kai Guan¹, Daisuke Egusa¹, Qiang Yang², Eiji Abe^1,3 (1. The University of Tokyo, Japan、2. State Key Laboratory of Rare Earth Resource Utilization (Chinese Academy of Sciences), China、3. National Institute for Materials Science, Japan)

Keywords:magnesium alloy、hardness、microstructure、precipitates、HAADF-STEM

The peak-hardness of the present alloy is 157 HV, which is attributed to the dense prismatic precipitates with dimension less than 10 nm, and some sparse basal precipitates with large aspect ratio.