Microstructure and Thermal Analysis of Mg-Al-Ca-Sr Alloys
The paper presents results of DSC and microstructural investigations of Mg-6Al-1Ca-1Sr-0.3Mn (ACJ611) and Mg-8Al-3Ca-1Sr-0.2Mn (ACJ831) magnesium alloy in as cast condition. The microstructure of this alloy consists of aluminum in magnesium solid solution and two types of eutectic: α-Mg+Al2Ca and α-Mg+Al3Mg13Sr. The liquidus temperature of ACJ611 magnesium alloy is 613°C. The eutectic reactions L α-Mg+Al2Ca and Lα-Mg+Al3Mg13Sr occurs at 510°C and 502°C temperatures, respectively. The increase of aluminum and calcium content increases the volume fraction of Al2Ca phase, decreases the liquidus temperature and slightly increases the temperature of eutectic reactions.
Prof. Andreas Öchsner, Prof. Graeme E. Murch, Ali Shokuhfar and Prof. João M.P.Q. Delgado
T. Rzychoń, "Microstructure and Thermal Analysis of Mg-Al-Ca-Sr Alloys", Defect and Diffusion Forum, Vols. 326-328, pp. 477-481, 2012