New Aluminum Piston Alloy with Increased Fatigue Strength at High Temperatures

Paper #:
  • 980687

Published:
  • 1998-02-23
Citation:
Mielke*, ., 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.
Pages:
7
Abstract:
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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