|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Fatigue in Materials: Fundamentals, Multiscale Modeling and Prevention
||GG-3: Experimental High Throughput Screening Using Micro Resonant Experiments as a Fundament for Fatigue Life Time Prediction
||Michael Buck, Thomas Straub, Chris Eberl
|On-Site Speaker (Planned)
Macroscopic crack propagation is relatively well understood, allowing low-cycle-fatigue lifetime predictions. In the HCF and VHCF regime crack initiation and short crack evolution become lifetime governing factors. Therefore, an experimental high throughput method has been developed, allowing to capture statistical information on damage evolution. The micro resonant fatigue setup is equipped by an optical camera system enabling quantitative in-situ damage characterization.
BCC stainless steel (17-4PH) was chosen since heat-treatment allows the switch between solution and precipitation strengthening as well as martensitic phase formation. Samples were characterized by EBSD and the damage evolution correlated to fatigue induced damage evolution (SEM, FIB), revealing critical grain configurations.
Statistical methods will be used to analyse the data in order to understand the links among the material properties and life time observation. Furthermore crack initiation, micro crack, and short crack models can be validated and used to develop better lifetime predictions.
||Planned: Publication Outside of TMS (Indicate publication title and publisher if known.)