Very high cycle fatigue properties of ultrahigh strength steels in the presence of hydrogen
The very high cycle fatigue (VHCF) properties of 2000 MPa ultrahigh strength martensitic steels after hydrogen pre-charging were investigated by means of ultrasonic fatigue tests. Results showed that the VHCF lives of the experimental steels were drastically decreased by about two orders after pre-charged with a hydrogen concentration of C H = 1.23 wppm. The experimental steel tempered at a higher temperature of 300 °C with some epsilon-carbides and a lower density of dislocations showed higher VHCF lives in the presence of hydrogen. It could be attributed to the lower hydrogen diffusion coefficient since hydrogen might accelerate fatigue crack propagation in the granular bright facet (GBF) area.
Authors
- Maoqiu Wang (ORCID: https://orcid.org/0000-0002-4400-0489)
- Wenchao Yu (ORCID: https://orcid.org/0000-0002-9148-4893)
- Xiaofei He (ORCID: https://orcid.org/0000-0001-9887-5566)
- Jie Shi (ORCID: https://orcid.org/0009-0002-7210-4418)
- Wanqing Lv (ORCID: https://orcid.org/0009-0002-9415-8126)
- Shipeng Zhu
Institutions
- China Iron and Steel Research Institute Group (CN)
- Shandong Iron and Steel Group (China) (CN)
Publication Details
- Journal
- Materials Science and Technology
- Published
- 2024-09-13
- DOI
- https://doi.org/10.1177/02670836241285333
- Primary Topic
- Material Properties and Failure Mechanisms
- Type
- article
- Field-Weighted Citation Impact
- 0.00