%0 conference lecture
%@ 
%A Huang, Y.,Zheng, X.,Kainer, K.U.,Hort, N.
%D 2010
%J New Frontiers in Light Metals, Proceedings of the 11th International Aluminium Conference INALCO 2010
%N 
%P 451-459 

%T Mechanism of Grain Refinement in Mg-Al Alloys with Carbon Inoculations
%U 
 
%X Previous Al4C3 nuclei hypothesis cannot explain the grain refinement mechanism of Mg-Al alloys inoculated by carbon because this nucleant is impossible to form during solidification. In the present investigation a ternary compound Al2MgC2 was identified. It has,a closer crystal structure to Mg than Al4C3. In the centre of grains, one or more “hillocks” with Al, Mn and C-enrichment were observed. A novel grain refinement mechanism is suggested to explain the grain refinement of Mg-Al alloys with carbon inoculations.