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J. Wayne Jones
Professor Emeritus
2022 Gerstacker
T: (734) 764-7503
Rapid Characterization of Fatigue Behavior in Cast Structural Material by Ultrasonic Fatigue
Sponsor: Ford Motor Company
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| Fatigue resistance is one of the most important design requirements of cast aluminum blocks and heads for automotive engines. The purpose of this project is to provide a critical assessment of the applicability of state-of-the-art ultrasonic fatigue techniques for the rapid and cost effective development of comprehensive fatigue databases for fatigue life prediction in cast structural aluminum and magnesium alloys. |
Highlights (Click an image for more information)
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Ultrasonic Fatigue of a Single Crystal Superalloy
An ultrasonic fatigue testing system with a loading frequency of ~20 kHz has been developed and its capability demonstrated on a single crystal superalloy (Rene N5 with Pt/Al coating) at elevated temperature (1800°F). Inter-dendritic defects and surface coating layer were found to be associated with crack initiation in the alloy. Interaction among cyclic loading, creep and oxidation plays a key role in fatigue crack propagation phase. (This project is sponsored by DARPA)