TY - JOUR N2 - In this study, the modification mechanism and growth process of Al3(Sc, Zr) particles in as-cast Al-Si-Mg-Cu based alloy with addition of Sc and Zr were systematically investigated. It was found that 0.57 wt-%Sc addition caused a significant refinement in the average grain size of the investigated alloy, which brought about a remarkable transformation in as-cast microstructure, from thick dendritic shape to fine equiaxed structure. A large amount of primary Al3(Sc, Zr) particles with the dimension of around 5-6 μm were also observed within the equiaxed grain. Due to the identical orientation and similar crystal structure between primary Al3(Sc, Zr) particles and α-Al matrix, the primary particles always served as heterogeneous nucleus for the α-Al matrix. In addition, these cusped cubic primary Al3(Sc, Zr) particles showed triangle, star, rhomboid morphologies are generated from sectioning the particle in (111), (100) and (110) planes, respectively. Particularly, the typical eutectic structure which contained odd number-layer (Al3(Sc, Zr)+α-Al+  +Al3(Sc, Zr)) was observed within the investigated particles. L1 - http://journals.pan.pl/Content/106779/PDF/AFE%202_2018_10.pdf L2 - http://journals.pan.pl/Content/106779 PY - 2018 IS - No 2 DO - 10.24425/122502 KW - solidification process KW - metallography KW - Al3(Sc, Zr) KW - three-dimensional morphology KW - eutectic growth A1 - Li Yukun A1 - Du Xiaodong A1 - Fu Junwei A1 - Zhang Ya A1 - Zhang Zhen A1 - Zhou Shiang A1 - Yucheng Wu PB - The Katowice Branch of the Polish Academy of Sciences VL - vol.18 DA - 2018 T1 - Modification Mechanism and Growth Process of Al3 (Sc, Zr) Particles in As-cast Al-Si-Mg-Cu-Zr-Sc Alloy UR - http://journals.pan.pl/dlibra/publication/edition/106779 T2 - Archives of Foundry Engineering ER -