Hypoeutectic aluminum alloys such as A356.0 (Al-7Si-0.3Mg) are usually subjected to strontium additions in order to obtain a chemically modified eutectic morphology. The modification of the eutectic silicon from sharp acicular plates to a fibrous structure is normally applied to improve the alloy ductility. However, strontium additions are relatively costly […]

Alternative Modification of A356 for Ductility Studied

The design freedoms inherent in investment casting help keep aluminum metal matrix composites cost effective. Paul Mikkola, Retired, Hitchiner Manufacturing, Milford, New Hampshire, and Bruce Willson, O’Fallon Casting, O’Fallon, Missouri The particulate silicon carbide reinforcement in aluminum alloy metal matrix composite (MMC) enhances this lightweight material with improved mechanical property […]

Investment Casting Metal Matrix Composites

The microstructure of austempered ductile iron (ADI) is composed of needle ferrite and carbon-enriched austenite, called ausferrite. ADI has excellent comprehensive mechanical properties, obtained by changing the chemical composition, austenitizing temperature and holding time, and austempering temperature and holding time. A lot of attention has been paid to the production […]

Research and Application of Carbidic Austempered Ductile Iron

Elkem’s recently introduced cover alloy, Topseed®, is changing the way that our customers think about their magnesium ferrosilicon treatment process. Designed to, Improve magnesium recovery Conditions the reaction slag Increase residual nucleation levels Improve process stability, Topseed® has already proved to be a great benefit in many foundries across North […]

Cover Alloy Improves Ductile Iron Production