| Issue |
MATEC Web Conf.
Volume 165, 2018
12th International Fatigue Congress (FATIGUE 2018)
|
|
|---|---|---|
| Article Number | 22005 | |
| Number of page(s) | 7 | |
| Section | Posters | |
| DOI | https://doi.org/10.1051/matecconf/201816522005 | |
| Published online | 25 May 2018 | |
Modeling of hydrogen effects on short crack propagation in a metastable austenitic stainless steel (X2CrNi19-11)
1
Institut für Werkstofftechnik, Universität Siegen, 57068 Siegen, Germany
2
Institut für Mechanik und Regelungstechnik - Mechatronik, Universität Siegen, 57068 Siegen, Germany
3
Materialprüfungsanstalt, Universität Stuttgart, 70174 Stuttgart, Germany
* Corresponding author: volker.schippl@uni-siegen.de
The experimentally observed short fatigue crack growth rate of an uncharged specimen tested in air is compared with results obtained from specimens tested in 10 MPa hydrogen atmosphere and specimens previously charged with hydrogen. To further discuss the hydrogen related short propagation mechanisms, a simulation approach for predicting short fatigue crack growth is presented. The boundary element method is used for calculating stresses and displacements in an anisotropic elastic solid. The hydrogen concentration is assumed to be homogeneously distributed in the microstructure. Based on this modelling approach, it could be concluded that hydrogen leads to an increasing short fatigue crack growth rate due to increasing irreversible deformation processes at the crack tip and also promotes grain boundary cracking in specimens tested in 10 MPa hydrogen atmosphere.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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