TY - JOUR N2 - In this study, precipitation of Ca in Al-Mg alloys containing a trace of Ca during homogenization was investigated using a transmission electron microscope (TEM) and calculated phase diagrams. TEM result indicated that the Ca-based particles found in the examined sample are Ca7Mg7.5Si14. From the calculation of Scheil-Gulliver cooling, it was found that the Ca was formed as Al4Ca and C36 laves phases with Mg2Si and Al13Fe4 from other impurities phase during solidification. No Ca-Mg-Si ternary phase existed at the homogenization temperature in the calculated phase diagram. From the phase diagram of Al-Al4Ca-Mg2Si three-phase isothermal at 490℃, it was shown that Ca7Mg6Si14 phase co-exists with Al, Mg2Si and Al4Ca in the largest region and with only Al and Mg2Si in Al4Ca-poor regions. It was thought that the Ca7Mg6Si14 ternary phase was formed by the interaction between Mg2Si and Al4Ca considering that the segregation can occur throughout the entire microstructures. L1 - http://journals.pan.pl/Content/119278/PDF/AMM-2021-4-07-Seong-Ho%20Ha.pdf L2 - http://journals.pan.pl/Content/119278 PY - 2021 IS - No 4 EP - 962 DO - 10.24425/amm.2021.136405 KW - Al-Mg system KW - precipitation KW - Mg+Al2Ca mater alloy KW - Transmission electron microscope KW - Phase diagram A1 - Ha, Seong-Ho A1 - Shin, Young-Chul A1 - Kim, Bong-Hwan A1 - Yoon, Young-Ok A1 - Lim, Hyun-Kyu A1 - Lim, Sung-Hwan A1 - Kim, Shae K. PB - Institute of Metallurgy and Materials Science of Polish Academy of Sciences PB - Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences VL - vol. 66 DA - 2021.12.28 T1 - Characterization of Ca Precipitation in Al-Mg Alloys Containing a Trace of Ca During Homogenization SP - 959 UR - http://journals.pan.pl/dlibra/publication/edition/119278 T2 - Archives of Metallurgy and Materials ER -