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New Aluminum Piston Alloy with Increased Fatigue Strength at High Temperatures
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 23, 1998 by SAE International in United States
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A new piston alloy was developed by combining the chemical compositions of copper and silicon rich aluminum alloys. Copper increases fatigue strength at low and intermediate temperatures of up to 250 °C whereas the increased amount of intermetallics raises fatigue strength at high temperature of 340 °C or beyond.
Casting difficulties can be handled by grain refinement of the α-aluminum. Engine tests show an increase of the lifetime of the thermally and mechanically highly loaded bowl rims of DI-Diesel pistons by a factor of four.
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CitationMielke*, ., Steffens, ., Beer, ., and Henning, ., "New Aluminum Piston Alloy with Increased Fatigue Strength at High Temperatures," SAE Technical Paper 980687, 1998, https://doi.org/10.4271/980687.
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