The Dimensional Stability of Cast 319 Aluminum 2003-01-0822
The automotive use of cast aluminum has greatly increased during the past decade, especially for engine blocks and cylinder heads. One physical property that is important in elevated-temperature applications is long-term dimensional stability of the cast aluminum component. Certain cast aluminum alloys (like 319) can undergo dimensional changes when exposed to engine operating temperatures over long periods of time; when these changes occur, the shape of the casting is distorted and the performance of the component may be diminished. Thus, a study was conducted to measure dimensional growth changes in a cast 319-type aluminum alloy as a function of heat-treatment, exposure temperature, and exposure time at the given temperature. The results show that all three factors have a significant effect upon the dimensional stability.
James M. Boileau, Carla A. Cloutier, Larry A. Godlewski, Paula A. Reeber-Symanski, Christopher Wolverton, John E. Allison
Ford Motor Company Scientific Research Laboratories
SAE 2003 World Congress & Exhibition
Advances in Lightweight Automotive Castings-SP-1734, Developments in Lightweight Aluminum Alloys for Automotive Applications: 2001-2005-PT-130, SAE 2003 Transactions Journal of Materials & Manufacturing-V112-5