J. Wayne Jones

Professor Emeritus

jonesjwa@umich.edu

2022 Gerstacker

T: (734) 764-7503

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Rapid Characterization of Fatigue Behavior in Cast Structural Material by Ultrasonic Fatigue

Sponsor: Ford Motor Company
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)
  • 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)