|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Failure, and a Career That is Anything But: An LMD Symposium Honoring J. Wayne Jones
||Very High Cycle Fatigue (VHCF) Phenomena – Influence of Microstructure on Crack Growth in the Near-threshold Regime Investigated by Means of Ultrasonic Fatigue Testing
||Martina Zimmermann, Tina Kirsten, Fatih Bülbül, Marcel Wicke, Angelika Brückner-Foit, Hans-Jürgen Christ
|On-Site Speaker (Planned)
It is of common consensus that VHCF behavior is primarily dominated by crack initiation rather than crack growth. However, experimental investigations on long fatigue crack behavior in the near-threshold regime become important whenever defect-afflicted materials are the object of consideration. Moreover, by realizing very low fatigue crack growth rates applying ultrasonic fatigue testing, microstructural characteristics that may act as barrier against fatigue crack propagation can be identified and the nature of a true durability discovered. Ultrasonic fatigue crack growth as was extensively explored at the fatigue laboratory at the University of Michigan (UofM) under the supervision of J. Wayne Jones is the central subject of the contribution. Inspired by his research activities a collaborative research project in Germany on the near-threshold fatigue crack growth behavior in a precipitation-hardened aluminum alloy was initiated, the results will be presented focusing on the barrier effect of primary precipitates and grain boundaries.
||Aluminum, Characterization, Other