Cover
Production of new aluminum-based composite material. Top row: Casting of MMC foundry ingots; close-up of the first-ever direct-chill (DC) casting of an MMC extrusion billet. Bottom row: Cast billet being head-stamped; MMC materials staged for shipment. The background is a photomicrograph (320X) of a polished specimen, showing the uniform distribution of particles in the matrix (15 vol% A1203 in 6061 aluminum). (Dural Aluminum Composites Corporation, San Diego.)