Abstract
A trinomial superposition model containing a temperature parameter and accounting for creep-fatigue interactive effect for predicting creep-fatigue crack growth rates is proposed in this paper. Items and parameters in the model are investigated via fatigue crack growth experiments with 0 s and 90 s dwell time at different elevated temperatures on a nickel-based powder metallurgy superalloy FGH97. The results indicate a good capability of the proposed model in correlating the crack growth rate with creep-fatigue interactive effect. The model is also validated by available test results of Alloy 718 at 550 C and 650 C with various dwell times.
| Original language | English |
|---|---|
| Pages (from-to) | 34-42 |
| Number of pages | 9 |
| Journal | International Journal of Fatigue |
| Volume | 59 |
| DOIs | |
| State | Published - 2014 |
Keywords
- Crack growth rate
- Creep-fatigue crack growth
- Creep-fatigue interaction
- High-temperature fatigue
- Nickel based superalloy
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