Casting Metal: Opera Studies after Humanism

On Liquid Metal Wetting of Casting Rings for DC Casting

During air–slip direct chill casting of aluminum alloys, uneven or low air pressure areas at the surface of the porous graphite ring mold, can cause the metal to stick to the graphite ring and produce traces along the billets called vertical drags (VD). To prevent this type of defect, it would be an advantage to decrease the wettability of the graphite ring. It has been shown that nanostructure...

Casting of SiC Reinforced Metal Matrix Composites

Composites based on two aluminium alloys (A536 and 6061) reinforced with 10% or 20% volume fraction of SiC particles were produced by gravity casting and a novel two-step mixing method was applied successfully to improve the wettability and distribution of the particles. The SiC particles were observed to be located predominantly in the interdendrit ic regions, and a thermal lag model is propos...

Numerical Simulations of Metal onto Composites Casting

The technical community of today is making increasing demands on weight reduction mainly for energy savings, particularly in the automotive industry, but also for better product ergonomics, for instance in the power tools sector. A lightweight product is usually produced using lightweight materials, for instance by integrating composites components into classical metal structures. This approach...

Opera Campus Opera Campus

Vocal Assessment Before, After, and the Day After Opera Performance.

OBJECTIVE To explore aerodynamic, acoustic, and laryngeal changes surrounding opera performance. STUDY DESIGN Prospective preperformance, postperformance, and day after performance. METHODS The laryngeal and vocal function of five male and five female classically trained singers was assessed immediately before, immediately after, and 1 day after an actual operatic performance. Phonatory thr...