THE EFFECT OF FE-RICH INTERMETALLICS ON MECHANICAL PROPERTIES OF SQUEEZE CAST AL-5.0CU-0.6MN ALLOYS WITH HIGH CONTENT OF FE

摘要

In high performance Al-Cu-based alloys, iron is one of the major impurities and thus is generally controlled to less than 0.15 wt%. However, it is necessary to extend the tolerance of Fe content for the purpose of low cost, energy saving and environment protection because of the increasing usage of recycled aluminum alloys. In this paper, The effect of Fe-rich intermetallics on mechanical properties of squeeze cast Al-5.0Cu-0.6Mn alloys with Fe content up to 1.5 wt% have been investigated by tensile testing, SEM and DSC techniques. The results were also compared with the alloys prepared by gravity die casting. There is a maximum ultimate tensile strength and yield strength for the alloys with 0.5 wt% Fe and the elongation is less sensitive to the Fe content than that of the gravity die cast alloys.