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- Title
Microstructure‐Dependent Local Fatigue Cracking Resistance of Bimodal Ti–6Al–4V Alloys.
- Authors
Zeng, Ling‐rong; Lei, Li‐ming; Yang, Jia; Luo, Xue‐mei; Zhang, Guang‐ping
- Abstract
The fatigue crack growth behavior of the bimodal Ti–6Al–4V alloys with two different volume fractions of the primary <italic>α</italic> phase (<italic>α</italic>p) of 76 and 36% is investigated by the in situ testing technique. The experimental results show that the crack growth rate of the <italic>α</italic>p = 36% Ti–6Al–4V alloy is lower than that of the <italic>α</italic>p = 76% one. The local fatigue crack growth rate is evidently decreased by the various boundaries including <italic>α</italic>p grain boundaries, boundaries between the <italic>α</italic>p phase and basketweave microstructure, and <italic>α</italic>/<italic>β</italic> lamellar interfaces. A criterion associated with the boundary characteristics is obtained to evaluate the grain boundary resistance to the fatigue crack growth in the engineering alloys.
- Subjects
FATIGUE cracks; TITANIUM-aluminum alloys; FRACTURE mechanics; ELECTRON backscattering; MICROSTRUCTURE
- Publication
Advanced Engineering Materials, 2018, Vol 20, Issue 4, p1
- ISSN
1438-1656
- Publication type
Article
- DOI
10.1002/adem.201700702