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Low Cost Al-Si Casting Alloy As In-Situ Composite for High Temperature ApplicationsA new aluminum-silicon (Al-Si) alloy has been successfully developed at NASA- Marshall Space Flight Center (MSFC) that has significant improvement in tensile and fatigue strength at elevated temperatures (500 F-700 F). The alloy offers a number of benefits such as light weight, high hardness, low thermal expansion and high surface wear resistance. In hypereutectic form, this alloy is considered as an in-situ Al-Si composite with tensile strength of about 90% higher than the auto industry 390 alloy at 600 F. This composite is very economically produced by using either conventional permanent steel molds or die casting. The projected material cost is less than $0.90 per pound, and automotive components such as pistons can be cast for high production rate using conventional casting techniques with a low and fully accounted cost. Key Words: Metal matrix composites, In-situ composite, aluminum-silicon alloy, hypereutectic alloy, permanent mold casting, die casting.
Document ID
20000010449
Document Type
Conference Paper
Authors
Lee, Jonathan A. (NASA Marshall Space Flight Center Huntsville, AL United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 2000
Subject Category
Metals and Metallic Materials
Meeting Information
Composites, Materials and Structures(Cocoa Beach, FL)
Funding Number(s)
PROJECT: RTOP 274-62
PROJECT: CDDF Proj. 97-10
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.