@article{Huang2026, 
author = {Jinhui Huang and Shuhong Liu and Zheyuan Liu and Xuezhen Che and Martin Friák and Yong Du},
title = {Refinement of Mg2Si in Mg-Al-Si alloys through Ca and Y additions: A novel core-shell structure evolution mechanism and enhanced mechanical properties},
year = {2026},
journal = {Journal of Magnesium and Alloys},
volume = {16},
number = {C},
keywords = {Adsorption, Mechanical properties, Core-shell structure, Heterogeneous nucleation, Mg2Si},
url = {https://www.sciopen.com/article/10.1016/j.jma.2025.03.008},
doi = {10.1016/j.jma.2025.03.008},
abstract = {Comprehensive experimental and theoretical investigations on microstructure and mechanical properties were conducted to explore the refinement of Mg2Si in Mg-Al-Si alloys through the addition of Ca and Y. Alloys of Mg-Al5.5-Si9.5-Cax (x = 0, 0.05, 0.1, 0.15, wt.%) and Mg-Al5.5-Si9.5-Yx (x = 0, 0.3, 0.6, 0.9, wt.%) were designed based on the CALPHAD (CALculations of PHAse Diagram) calculations and literature data. With the experimentally determined optimal individual addition of 0.1 wt.% Ca and 0.9 wt.% Y respectively, a cross-experiment involving simultaneous addition of Ca and Y for the refinement of Mg2Si was carried out. The alloy composition with the optimal refinement effect and mechanical properties was identified as Mg-Al5.5-Si9.5-Ca0.1-Y0.6 (wt.%). In Y-containing alloys, a novel core-shell structure evolution mechanism of MgSi2Y2//Al4MgY//Mg2Si was proposed based on experimental observation and first principles calculations, revealing MgSi2Y2 as the core for the heterogeneous nucleation of Mg2Si.}
}