The role of crack closure in fatigue crack propagation behavior of a TiAl-based alloy
Journal Article
·
· Scripta Materialia
- ENSMA, Futuroscope (France). Lab. de Mecanique et de Physique des Materiaux
The fatigue crack growth rates measured in the case of the TiAl-based alloy investigated in the present study are highly sensitive to the {Delta}K value. The fatigue crack propagation is deeply affected by the crack closure phenomenon. As a consequence the crack growth rates are severely lessened as soon as closure develops. The role of crack closure is confirmed by the influence of the R load ratio: indeed the crack growth rate measured under closure-free conditions at high R ratios is equal to that obtained at low R values after crack closure correction for a given {Delta}K{sub eff} value.
- OSTI ID:
- 233900
- Journal Information:
- Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 9 Vol. 34; ISSN 1359-6462; ISSN XZ503X
- Country of Publication:
- United States
- Language:
- English
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