Life Prediction of Stainless Steels under Creep-Fatigue

Xiao Cong He

doi:10.4028/www.scientific.net/KEM.413-414.725

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 413-414Life Prediction of Stainless Steels under...

Life Prediction of Stainless Steels under Creep-Fatigue

Abstract:

The aim of this study is to investigate the creep-fatigue behavior of stainless steel materials. Based on the elevated-temperature tensile, creep and rupture test data, thermal creep-fatigue modelling was conducted to predict the failure life of stainless steels. In the low cycle thermal fatigue life model, Manson’s Universal Slopes equation was used as an empirical correlation which relates fatigue endurance to tensile properties. Fatigue test data were used in conjunction with different modes to establish the relationship between temperature and other parameters. Then creep models were created for stainless steel materials. In order to correlate the results of short-time elevated temperature tests with long-term service performance at more moderate temperatures, different creep prediction models, namely Basquin model, Sherby-Dorn model and Manson-Haferd model, were studied. Comparison between the different creep prediction models were carried out for a range of stresses and temperatures. A linear damage summation method was used to establish life prediction model of stainless steel materials under creep-fatigue.

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Periodical:

Key Engineering Materials (Volumes 413-414)

Pages:

725-732

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.413-414.725

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Online since:

June 2009

Authors:

Xiao Cong He

Keywords:

Creep, Life Prediction, Low Cycle Thermal Fatigue, Stainless Steel (SS)

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