7Tavitas-Medrano F J, Gruzleski J E, Samuel F H. Artifical ag- ing behavior of 319-type cast aluminum alloys with Mg and Sr additions [ J ]. AFS Transactions, 2007 : 7-15.
8Tavitas-Medrano F J, Mohamed A M A, Gruzleski J E, et al. Precipitation-hardening in cast AI-Si-Cu-Mg alloys [J ]. Journal of Material Science, 2010,45 : 641-651.
9Li R X, Li R D, He Y H, et al. Age-hardening behavior of cast A1-Si base alloy [ J ]. Materials Letter, 2004,58 : 2096-2101.
10Samuel F H. Incipent melting of A15Mg8Si6Cu2 and AI2Cu in- termetallics in unmodified and strontium-modified AI-Si-Cu-Mg (319) alloys during solution heat treatment [J ]. Journal of Ma- terial Science, 1998,33 : 2283-2297.
