Abstract
Axial loading tests with variable stress ratio were performed to investigate the very high cycle fatigue property of TC4 titanium alloy, and a life prediction approach associated with failure mechanism was proposed. The interior failure process is characterized as: (1) occurrence of slip lines or bands on partial α grains, (2) nucleation of micro-cracks within some α grains, (3) coalescence of micro-cracks and formation of granular bright facets, (4) stable macro-crack growth within fisheye (5) unstable crack growth outside fisheye and (6) momentary fracture. The validity of approach is confirmed by the good agreement between predicted and experimental results.
| Original language | English |
|---|---|
| Pages (from-to) | 342-354 |
| Number of pages | 13 |
| Journal | International Journal of Fatigue |
| Volume | 104 |
| DOIs | |
| Publication status | Published - Nov 2017 |
Keywords
- Granular bright facets
- Nucleation and growth
- TC4 titanium alloy
- Theory and modeling
- Very high cycle fatigue
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Li, W., Zhao, H., Nehila, A., Zhang, Z., & Sakai, T. (2017). Very high cycle fatigue of TC4 titanium alloy under variable stress ratio: Failure mechanism and life prediction. International Journal of Fatigue, 104, 342-354. https://doi.org/10.1016/j.ijfatigue.2017.08.004