Microstructure and mechanical properties of in situ Al–Mg 2 Si composites

Abstract

In situ metal matrix composites (MMCs) with Mg₂Si particulate reinforcement have been developed recently as ultralight materials. In this paper, a brief overview of the physical and mechanical properties of Mg₂Si and the current status of research on Mg₂Si reinforced MMCs is presented, followed by more detailed information on recent progress in the research group of the present authors. The effects of element additions and processing parameters on the microstructure of the composites obtained by gravity casting are discussed, together with some mechanical property data.