An investigation of small fatigue crack behavior in titanium alloy TC4 under different stress levels
An investigation of small fatigue crack behavior in titanium alloy TC4 under different stress levels
- New search for: Zhu, Lei
- Further information on Zhu, Lei:
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https://orcid.org/0000-0002-7183-6636
- New search for: Hu, Xuteng
- New search for: Jiang, Rong
- New search for: Song, Yingdong
- New search for: Qu, Shoudao
- New search for: Zhu, Lei
- Further information on Zhu, Lei:
-
https://orcid.org/0000-0002-7183-6636
- New search for: Hu, Xuteng
- New search for: Jiang, Rong
- New search for: Song, Yingdong
- New search for: Qu, Shoudao
In this paper, the small fatigue crack behavior in titanium alloy TC4 under different stress levels was investigated. Single-edge-notch tension specimens were axially fatigued with stress ratio of 0.1 at room temperature. Results show that the naturally initiated cracks nucleate from the α/β interfaces. When the crack is below a critical length of ∼200 µm, crack growth rates exhibit large fluctuations and temporary retardations due to microstructure effects. But once the crack length exceeds ∼200 µm, the fluctuations in crack growth rates die down and the crack grows more rapidly. There is no distinct effect of stress level on small crack growth rate. A linear relationship exists between the total fatigue life and crack initiation life.
Document information
An investigation of small fatigue crack behavior in titanium alloy TC4 under different stress levels
2019-12-01
12 pages
Article (Journal)
Electronic Resource
English
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