Melting and casting characteristics of aluminum alloy A356-SiC particulate reinforced cast composites

Miscellaneous · Tue Jan 01 00:00:00 EST 1991

OSTI ID:7228830

Yarandi, F M

Melting and casting characteristics of A356 (Al 7% Si) alloy reinforced with 10, 15, and 20 vol. % SiC particles were studied. Remelting followed by holding and solidification of these composites leads to settling of the SiC particles to the bottom of the mold. The height of the SiC particle-free zone formed at the top of the mold, as a result of settling, is referred to as the denuded zone. A356 with 20 vol. % SiC ({approximately}14-{mu} particle size) showed larger denuded zones for a given settling time compared to the system with 10 or 15 vol. % SiC. The permanent mold and sand mold spiral fluidities, and permanent mold casting fluidity of Al A356-SiC particle melt slurry generally decrease with increasing vol. % of a given size SiC. The fluidity values increase with temperature until a temperature range of 740-760C. Solidification microstructures formed during static settling and during flow along the length of the casting fluidity for SiC particle composites were analyzed. Influences of cooling rate, settling time, and oxide films on solidification microstructures were investigated.

• Research Organization: Wisconsin Univ., Milwaukee, WI (United States)
• OSTI ID: 7228830
• Resource Relation: Other Information: Thesis (Ph.D.)
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
FABRICATION
MICROSTRUCTURE
ALUMINIUM ALLOYS
SILICON ALLOYS
SILICON CARBIDES
SOLIDIFICATION
ALLOYS
CARBIDES
CARBON COMPOUNDS
CRYSTAL STRUCTURE
MATERIALS
PHASE TRANSFORMATIONS
SILICON COMPOUNDS
360601* - Other Materials- Preparation & Manufacture
360602 - Other Materials- Structure & Phase Studies