The effect of mean stress on the high-temperature fatigue behaviour of SAE 1045 steel

Christ, H.‐J.; Wamukwamba, C.K.; Mughrabi, H.

doi:10.1016/s0921-5093(97)00223-2

Cited by 18 publications

(5 citation statements)

References 5 publications

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Section: Resultsmentioning

confidence: 99%

“…Performing cyclic loading tests at high temperature could lead to a different cyclic behaviour in comparison with cyclic loading tests at room temperature. The effects of mean stress on the high-temperature fatigue behaviour of CK45 were studied by Christ et al, 32 and the fatigue tests were performed at high temperatures of above 200°C. There are several recent studies on influence of high temperature on cyclic behaviour such as Kang et al 33 dealing with the cyclic behaviour of 304 L stainless steel under stress control and strain control at different temperatures (20, 350 and 700°C), Yu et al 34 studied cyclic behaviour of Z2CND18.12 N stainless steel under tension compression at different temperatures (20,150,250,350, 450 and 550°C).…”

Section: Ratcheting Behaviourmentioning

confidence: 99%

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An investigation of the fatigue of CK45 steel in the as‐received state and after pre‐fatigue deformation

Shariati

Mehrabi

2014

Fatigue Fract Eng Mat Struct

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Fatigue failure, ratcheting behaviour and influence of pre‐fatigue on fatigue behaviour were investigated under uniaxial cyclic loading for CK45 steel at room temperature. The fatigue life was recorded for various stress ratios, and then, three mean stress models were considered. The Walker model showed an acceptable accuracy in comparison with Smith–Watson–Topper and Park et al. models. The ratcheting strains were measured for various loading conditions in order to evaluate the impact of mean stress, stress amplitude and stress ratio on ratcheting behaviour. The experimental results showed that the ratcheting strain increased with increasing mean stress, stress amplitude and stress ratio. In addition, the results of the post‐ratcheting‐fatigue tests showed that although the fatigue life decreased with increasing pre‐ratcheting strain (the ratcheting strain that is accumulated in pre‐fatigue), the loading condition that pre‐fatigue experiments were conducted has a significant effect on subsequent fatigue behaviour.

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Section: Resultsmentioning

confidence: 99%

Section: Ratcheting Behaviourmentioning

confidence: 99%

An investigation of the fatigue of CK45 steel in the as‐received state and after pre‐fatigue deformation

Shariati

Mehrabi

2014

Fatigue Fract Eng Mat Struct

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“…The prediction of fatigue life in the presence of the mean stress requires the knowledge of the effect of the mean stress on the cyclic stress-strain behaviour. Several papers studied different aspects of the effect of mean stress on the cyclic stress-strain response in polycrystalline copper [12][13][14], in polycrystalline nickel [15], in carbon and alloy steels [16][17][18][19][20], in austenitic stainless steels [21] and in ferritic-martensitic steel [22,23]. In most cases the presence of the mean stress resulted in an increase of the plastic strain amplitude during the whole life and in cyclic creep acceleration.…”

Section: Introductionmentioning

confidence: 99%

Cyclic plasticity, cyclic creep and fatigue life of duplex stainless steel in cyclic loading with positive mean stress

Polák¹,

Petrenec²,

Man³

2011

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Austenitic-ferritic duplex stainless steel was cycled with three constant stress amplitudes and different mean stresses and cyclic stress-strain response and fatigue life were measured. Fatigue hardening/softening curves and cyclic creep curves were recorded. Saturated plastic strain amplitude was plotted vs. stress amplitude to obtain cyclic stress-strain curves for different mean stresses. The dependence of the cyclic stress-strain curve on the mean stress was established. Cyclic creep rate decreases progressively during the fatigue life leading to saturation of the mean stress. Fatigue life decreases with the mean stress and different representation of the fatigue life curves were presented and discussed in terms of crack initiation and growth.

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“…As to the expected mechanical behaviour at hightemperature of structural steel C45, by testing under fatigue loading specimens of SAE 1045, Christ et al 47 have observed that, given the amplitude and mean stress of the loading cycle, fatigue damage reaches its maximum value at a temperature in the range 200-250°C. The reasons briefly summarised above should explain the motivations behind the choice of testing commercial structural steel C45 at 250°C.…”

Section: E X P E R I M E N T a L D E T A I L Smentioning

confidence: 97%

The linear‐elastic Theory of Critical Distances to estimate high‐cycle fatigue strength of notched metallic materials at elevated temperatures

Louks

Susmel

2014

Fatigue Fract Eng Mat Struct

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This paper investigates the accuracy of the linear‐elastic Theory of Critical Distances (TCD) in estimating high‐cycle fatigue strength of notched metallic materials experiencing elevated temperatures during in‐service operations. The TCD postulates that the fatigue damage extent can be estimated by directly post‐processing the entire linear‐elastic stress field acting on the material in the vicinity of the crack initiation locations. The key feature of this theory is that the high‐cycle fatigue assessment is based on a scale length parameter that is assumed to be a material property. The accuracy of this design method was checked against a number of experimental results generated, under axial loading, by testing, at 250 °C, notched specimens of carbon steel C45. To further investigate the reliability of the TCD, its accuracy was also checked via several data taken from the literature, these experimental results being generated by testing notched samples of Inconel 718 at 500 °C as well as notched specimens of directionally solidified superalloy DZ125 at 850 °C. This validation exercise allowed us to prove that the linear‐elastic TCD is successful in estimating high‐cycle fatigue strength of notched metallic materials exposed to elevated temperature, resulting in estimates falling within an error interval of ±20%. Such a high level of accuracy suggests that, in situations of practical interest, reliable high‐cycle fatigue assessment can be performed without the need for taking into account those non‐linearities characterising the mechanical behaviour of metallic materials at high temperature, the used critical distance being still a material property whose value does not depend on the sharpness of the notch being designed.

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The effect of mean stress on the high-temperature fatigue behaviour of SAE 1045 steel

Cited by 18 publications

References 5 publications

An investigation of the fatigue of CK45 steel in the as‐received state and after pre‐fatigue deformation

An investigation of the fatigue of CK45 steel in the as‐received state and after pre‐fatigue deformation

Cyclic plasticity, cyclic creep and fatigue life of duplex stainless steel in cyclic loading with positive mean stress

The linear‐elastic Theory of Critical Distances to estimate high‐cycle fatigue strength of notched metallic materials at elevated temperatures

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