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To explore the effect of strontium on the structure of as-cast A356 alloy, the strontium was incorporated to the alloy by metallothermic reduction of SrO where the mineral was added to the melt through the submerged powders injection technique. The evaluation of the modifi cation of the eutectic silicon and the chemical analysis of samples were done using optical microscopy(OP) and inductively coupled plasma(ICP), respectively, while microstructural analyses by scanning electron microscopy(SEM), and the injection time was variable. Magnesium was added to the melt to increase the reactivity and reduce the surface tension of the molten aluminum. It was possible to increase the strontium content from 0 to 0.027% after 20 minutes treatment. This concentration was suffi cient to bring about full modifi cation structure of eutectic silicon of as cast alloy A 356 and the acceptable quality metallurgical of alloy.
To explore the effect of strontium on the structure of as-cast A356 alloy, the strontium was incorporated to the alloy by metallothermic reduction of SrO where the mineral was added to the melt through the submerged powders injection technique. The evaluation of the modifi cation of of the eutectic silicon and the chemical analysis of samples were done using optical microscopy (OP) and inductively coupled plasma (ICP), respectively, while microstructural analyzes by scanning electron microscopy (SEM), and the injection time was variable. melt to increase the reactivity and reduce the surface tension of the molten aluminum. It was possible to increase the strontium content from 0 to 0.027% after 20 minutes treatment. This concentration was suffi cient to bring about full modifi cation structure of eutectic silicon of as cast alloy A 356 and the acceptable quality metallurgical of alloy.