The mean stress and phase angle effect on multiaxial fatigue behavior of a TiAl alloy: Failure analysis and life modeling

Zhang, Qiang; Hu, Xiaoan; Zhang, Ziruo; Sun, Tong; Wu, Jinwu; Li, Yifan; Ren, Tingting

doi:10.1016/j.ijmecsci.2020.106123

Cited by 14 publications

(4 citation statements)

References 68 publications

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“…This rotation means both the shear strain and the normal strain on the maximum shear plane cannot reach the maximum at the same time. Moreover, because of the phase difference between the two, they interact with each other to produce an additional hardening phenomenon [28,29]. The 90° non-proportional circular paths have the greatest additional The fatigue life of S135 steel under 90 • non-proportional loading can be fitted by Equation (1):…”

Section: Fatigue Life and S-n Curvementioning

confidence: 99%

Fatigue and Life Prediction of S135 High-Strength Drill Pipe Steel under Tension–Torsion Multiaxial Loading

et al. 2022

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This paper investigates the fatigue behavior of S135 high-strength drill pipe steel under tension–torsion multiaxial loading. Based on the concept of critical plane during fatigue, the fatigue model under the combined loading of tension–torsion is established. The proposed model is validated, and the predicted results are in good agreement with the experimental testing results. The maximum relative errors between the estimation and the experiment are mostly within the range of factor two to three for proportional, and 90° non-proportional tension–torsion loading. Meanwhile, the failure mechanism is also discussed through fracture analysis.

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Section: Fatigue Life and S-n Curvementioning

confidence: 99%

Fatigue and Life Prediction of S135 High-Strength Drill Pipe Steel under Tension–Torsion Multiaxial Loading

et al. 2022

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“…[1][2][3] TiAl alloys are mainly composed of spherical equiaxed γ phase and α 2 phase. 4,5 In recent years, the microstructure and properties in service or near-service conditions of TiAl alloy were investigated, [6][7][8][9][10][11][12][13][14][15][16] which mainly covers new TiAl alloys with better hot workability, higher service temperature, and better low-temperature fracture toughness. Compared with nickel-based alloys commonly used in aviation turbine blades, TiAl alloys have excellent high temperature resistance, oxidation resistance, and even better specific high temperature strength.…”

Section: Introductionmentioning

confidence: 99%

Effect of stress ratio on high cycle fatigue behavior of TNM‐TiAl alloy

Sun

Cao

Zhou

et al. 2022

Fatigue Fract Eng Mat Struct

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In order to investigate the effect of stress ratio on room temperature high-cycle fatigue life of Ti-43.5Al-4Nb-1Mo-0.1B alloy, high-cycle fatigue life test of TNM-TiAl alloy at stress ratio of À1, À0.5, 0.1, 0.5, 0.8, and 1 was performed on the universal testing machine. The fracture mechanism of TNM-TiAl alloy under different stress ratios was determined by observation and analysis of microstructure and fracture surface by scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), and optical microscope (OM). The results show that fatigue life of TNM-TiAl alloy with different stress ratios is mainly affected by the mean stress and stress amplitude. The fatigue life decreases with the increase of the stress amplitude and with the decrease of the mean stress. When the stress amplitude is constant, the higher the stress ratio is, the higher the mean stress in the loading process is, the lower the fatigue life is. The sensitivity of the stress amplitude of TNM-TiAl alloy gradually increases with the increase of the stress ratio. The different cracking mechanism and fracture mechanisms at various stress ratio are revealed.

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“…For instance, Barbosa et al [22] proposed an artificial neural network prediction method considering the influence of average stress on the fatigue life of metallic materials. Zhang et al [23] analyzed the influence of mean stress and phase angle on multiaxial fatigue behavior of TiAl alloy and established a life model. Benedetti et al [24] developed a new fatigue criterion based on strain-energy-density (SED) to illustrate the influence of mean stress and plasticity on the uniaxial fatigue strength.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Life Prediction of Rolling Bearings Based on Modified SWT Mean Stress Correction

Huang

et al. 2020

Preprint

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Mean stress has a great influence on fatigue life, commonly used stress-based life prediction models can only fit the test results of fatigue life under specific stress ratio or mean stress but cannot describe the effect of stress ratio or mean stress on fatigue life. Smith, Watson and Topper (SWT) proposed a simple mean stress correction criterion. However, the SWT model regards the sensitivity coefficient of all materials to mean stress as 0.5, which will lead to inaccurate predictions for materials with a sensitivity coefficient not equal to 0.5. In this paper, considering the sensitivity of different materials to mean stresses, compensation factor is introduced to modify the SWT model, and several sets of experimental data are used for model verification. Then, the proposed model is applied to fatigue life predictions of rolling bearings, and the results of proposed method are compared with test results to verify its accuracy.

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The mean stress and phase angle effect on multiaxial fatigue behavior of a TiAl alloy: Failure analysis and life modeling

Cited by 14 publications

References 68 publications

Fatigue and Life Prediction of S135 High-Strength Drill Pipe Steel under Tension–Torsion Multiaxial Loading

Fatigue and Life Prediction of S135 High-Strength Drill Pipe Steel under Tension–Torsion Multiaxial Loading

Effect of stress ratio on high cycle fatigue behavior of TNM‐TiAl alloy

Fatigue Life Prediction of Rolling Bearings Based on Modified SWT Mean Stress Correction

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