Life Prediction of Two Rotor Steels under Creep-Fatigue Interaction at Elevated Temperature

Abstract:

The fatigue tests with 16 hours hold time have been conducted for two rotor steels, 1CrMoV and 2CrMoNiVW at 550°C to investigate their creep-fatigue interaction behaviors, as well as those without hold time for contrast. And two life prediction methods are used to correlate the present creep-fatigue life data. It is shown that a significant reduction in fatigue life is observed with hold time in tension, and it is also observed that 1CrMoV steel exhibits a higher creep-fatigue life than 2CrMoNiVW when strain hold time is 16 hours, and 2CrMoNiVW seems to be more sensitive to hold time influence. In addition, both methods could give satisfactory creep-fatigue life predictions, but with their own limitations.

• Periodical: Applied Mechanics and Materials (Volume 470)
• Pages: 581-584
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.470.581
• Online since: December 2013
• Authors: Hong Xu, Wei Wei Zhang*, Karl Maile
• Keywords: Creep, Fatigue, Life Prediction, Rotor Steel, Stress Relaxation

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