Preparation of Eutectic Mg,Si with Low Aspect Ratio in Al-Mg-Si Alloy Under Sub Rapid Solidification Conditions
YU Hongchen1*，GAO Yongqi2
(1.School of Mechanical and Electrical Engineering, Changchun Institute of Technology, Changchun 130021 , china;2.School of Applied Technology , Changchun Institute of Technology , Changchun 130021 .China)
Abstract: By combining trace element modification technology with sub rapid solidification technology , the aspect ratio of eutectic Mg2Si was reduced in Al-12Mg2Si alloy modified with Sb.The morphology of eutectic Mg2Si changed from coarse Chinese script to fine small-worm. Meanwhile, under sub rapid solidification conditions, the particle size of eutectic Mg2Si is decreased significantly.The tensile performance test of the sample revealed that the mechanical properties of the sample prepared by combining sub rapid solidification technology with trace element modification were higher.The ultimate tensile strength was increased to 235 MPa and the fracture elongation increased to about 5%.A higher cooling rate can significantly refine the particle sizeof eutectic Mg2Si. Moreover , uniformly distributed modifier atoms can fully adsorb on various crystal planes of eutecticMg2Si,which leads to a decrease in the aspect ratio of eutectic Mg,Si particles.
于宏辰, 高永琦. 亚快速凝固条件下AI-Mg-Si合金中低长径比共晶Mg2Si的制备[J]. 吉林化工学院学报, 2025, 42(1): 93-98.
YU Hongchen, GAO Yongqi. Preparation of Eutectic Mg,Si with Low Aspect Ratio in Al-Mg-Si Alloy Under Sub Rapid Solidification Conditions. Journal of Jilin Institute of Chemical Technology, 2025, 42(1): 93-98.
