A study on the damage mechanism and life prediction in austenitic stainless steels under creep-fatigue interaction condition Lee, J. M., Choi, B. G. and Nam, S. W. J. Korean Inst. Met. Mater. (June 1994) 32 (6), 683–689 (in Korean)

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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A correlation between creep-fatigue life and tensile hold time for austenitic stainless steels

Journal of Materials Science Letters ◽

10.1007/bf00270957 ◽

1994 ◽

Vol 13 (17) ◽

pp. 1270-1271 ◽

Cited By ~ 8

Author(s):

Young Cheol Yoon ◽

Soo Woo Nam

Keyword(s):

Fatigue Life ◽

Stainless Steels ◽

Hold Time ◽

Austenitic Stainless Steels ◽

Tensile Hold ◽

Creep Fatigue ◽

Tensile Hold Time

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Thermomechanical fatigue life prediction method for nickel-based superalloy in aeroengine turbine discs under multiaxial loading

International Journal of Damage Mechanics ◽

10.1177/1056789519831050 ◽

2019 ◽

Vol 28 (9) ◽

pp. 1344-1366 ◽

Cited By ~ 2

Author(s):

Fang-Dai Li ◽

De-Guang Shang ◽

Cheng-Cheng Zhang ◽

Xiao-Dong Liu ◽

Dao-Hang Li ◽

...

Keyword(s):

Fatigue Damage ◽

Cyclic Deformation ◽

Deformation Behavior ◽

Life Prediction ◽

Prediction Method ◽

Creep Damage ◽

Damage Mechanism ◽

Thermomechanical Fatigue ◽

Nickel Based Superalloy ◽

Creep Fatigue

The multiaxial thermomechanical fatigue properties for nickel-based superalloy GH4169 in aeroengine turbine discs are investigated in this paper. Four types of axial–torsional thermomechanical fatigue experiments were performed to identify the cyclic deformation behavior and the damage mechanism. The experimental results showed that the creep damage can be generated under thermally in-phase loading while it can be ignored under thermally out-of-phase loading, and the responded stress increasing phenomenon, that is, non-proportional hardening, can be shown under the mechanically out-of-phase strain loading. Based on the analysis of cyclic deformation behavior and damage mechanism, a life prediction method was proposed for multiaxial thermomechanical fatigue, in which the pure fatigue damage, the creep damage, and the interaction between them were simultaneously considered. The pure fatigue damage can be calculated by the isothermal fatigue parameters corresponding to the temperature without creep; the creep damage can be calculated by the principle of subdivision, and the creep–fatigue interaction can be determined by creep damage, fatigue damage, and an interaction coefficient which is used to reflect the creep–fatigue interaction strength. The predicted results showed that the proposed method is reasonable.

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