Effect of strontium, magnesium and iron content on mechanical properties of Rheocast Al-7 mass% Si-Mg alloys

Abstract

Newly developed Rheocasting process makes semi-liquid slurry in metallic vessel without stirring process. Semi-liquid castings made by this process show good mechanical properties. The effects of strontium, magnesium and iron contents on the mechanical properties of Rheocast and squeeze cast Al-7 mass%Si-Mg alloys were investigated. Elongation of Al-7 mass%Si-Mg alloy Rheocastings was higher than those of squeeze castings when strontium was not added or iron content was up to 0,27mass%. Both Rheocastings and squeeze castings increased in strength but decreased in elongation with increasing magnesium content in Al-7 mass%Si-;miass%Mg (x = 0.23-0,64) alloy. © 2009 Japan Foundary Engineering Society.