MATEC Web Conf.
Volume 165, 201812th International Fatigue Congress (FATIGUE 2018)
|Number of page(s)||4|
|Section||Very High Cycle Fatigue|
|Published online||25 May 2018|
The influence of tension mean stress to the crack initiation process at the very high cycle fatigue regime for a high strength steel
Karlsruhe Institute of Technology (KIT) Institute for Applied Materials (IAM), Engelbert-Arnold-Str. 4, 76131 Karlsruhe, Germany
2 Karlsruhe University of Applied Sciences, Moltkestr. 30, 76133 Karlsruhe, Germany
* Corresponding author: firstname.lastname@example.org
Strain controlled tests were performed on a high strength steel to investigate the influence of tension mean stress to the crack initiation process at the very high cycle fatigue regime. It is supposed that the variation of stress the state in the vicinity of a non-metallic inclusion results in a change to the energy transferred to the surrounding metallic matrix. To prove this, incremental step tests on cylindrical specimen were realized in which the tension mean stress was stepwise increased. It could be verified that the hysteresis area, which is a criterion of the work transferred to the specimen, decreases with increasing tension mean stress. The test results provide a reasonable physical model to estimate the influence of tension mean stress to the crack initiation process in the very high cycle fatigue regime.
© 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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