| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
An In-situ Analysis on the Fatigue Damage in Martensitic Spring Steel |
| Author(s) |
Anna Wildeis, Matthias Thimm, Robert Brandt, Hans-Jürgen Christ, Claus-Peter Fritzen |
| On-Site Speaker (Planned) |
Anna Wildeis |
| Abstract Scope |
In the high cycle fatigue regime, crack initiation and short crack propagation can account for up to 90% of the fatigue life, which is an important motivation for studying these fatigue stages. However, the underlying mechanisms for short crack propagation in a martensitic spring steel are still not clear, especially if residual stresses must be taken into account.
This investigation aims at the investigation of short crack propagation in a martensitic spring steel by means of in-situ fatigue tests in a confocal laser microscope and additional electron back-scattered diffraction analyses to link the local crystallographic orientation of the hierarchical martensitic microstructure with the short crack propagation behaviour. In order to determine the effect of residual stresses, samples are tested with and without prior shot peening treatments. Furthermore, the adaptation of a short crack model based on the boundary element method to the results obtained is presented. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Iron and Steel, Other |