Rai, R K and Sahu, J K (2019) Mean-stress and oxidation effects on fatigue behaviour of CM 247 DS LC alloy. Materials Science and Technology, 35(10) . pp. 1220-1226.
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Abstract
During present investigations, an attempt was made to understand the effect of mean stress and oxidation on low cycle fatigue (LCF) behaviour of CM 247 DS LC alloy at T = 850°C. A significant reduction in fatigue life was observed during LCF tests conducted at strain ratio (R) of 0 as compared to R = −1. Reduction in fatigue life is attributed to the synergistic effect of mean stress, oxidation and the expanding precipitates within the grain boundaries which imparts high stresses at the grain boundary leading to the intergranular cracking. Additionally, to account the effect of mean stress on fatigue life of the alloy CM 247 DS LC empirical relations developed by Smith–Watson–Topper (SWT) and Morrow were used.
| Item Type: | Article |
|---|---|
| Official URL/DOI: | https://doi.org/10.1080/02670836.2019.1618048 |
| Uncontrolled Keywords: | Low-cycle fatigue; nickel-base superalloy; deformation; strain;Superalloy, low cycle fatigue, microstructure, oxidation |
| Divisions: | Material Science and Technology |
| ID Code: | 7950 |
| Deposited By: | Sahu A K |
| Deposited On: | 26 Sep 2019 13:04 |
| Last Modified: | 26 Sep 2019 13:04 |
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