INFLUENCE OF IRON AND MANGANESE ON STRUCTURE AND MICROPOROSITY OF THE DC CAST AA5083 ALLOY

摘要

The AA5083 alloy is one of the most common alloys in the AA5xxx series wrought aluminum alloys. The effect of iron and manganese content on the microstructure and microporosity has been studied by optical microscopy (OM), scanning electron microscopy (SEM) and energy-dispersive X-ray analysis. It was clear underlined that micropores are well connected with iron- and manganese intermetallics, which cause blockage in the interdendritic channels, which hinder feeding and hence promote microporosity of DC cast alloys.