Abstract
The present investigation deals with the high cycle fatigue (HCF) behaviour of a 10 wt% Cr steel at ambient as well as elevated temperatures (300–853 K). S–N curves were generated at different temperatures employing an R-ratio of −1. Influence of mean stress was established through Haigh diagram at 853 K using different R-values. Fatigue life was found to decrease with increase in test temperature and stress amplitude. Prediction of fatigue life was attempted using Basquin equation. Detailed fracture surface analysis was performed to study the crack initiation and propagation modes towards understanding the mechanisms of failure at different temperatures.
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