In-phase thermomechanical fatigue lifetime prediction of nickel-based single crystal superalloys from smooth specimens to notched specimens based on coupling damage on critical plane

Wang, Rongqiao; Zhang, Bin; Hu, Dianyin; Jiang, Kanghe; Hao, Xinyi; Mao, Jianqin; Jing, Fulei

doi:10.1016/j.ijfatigue.2019.05.016

Cited by 34 publications

(8 citation statements)

References 40 publications

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“…[41], under uniaxial load, creep damage evolution could be expressed as:

{dD}_{c} goodbreak= {(1 - D_{c})}^{- m} {(\frac{σ}{A})}^{R} italicdt

where D c is creep damage, σ is macroscopic stress, and m , A , R are temperature‐dependent material constants. According to previous studies, creep fracture of nickel‐based single crystal superalloy is closely related to crystal slip, 1,42 and it is logical to select the maximum Schmid stress in slip systems to characterize creep damage of nickel‐based single crystal superalloys 43,44 . Generally, for nickel‐based single crystal superalloy, slip could occur in 12 primary directions and 12 secondary directions on four octahedral slip planes and 6 directions on three cubic slip planes.…”

Section: Anisotropic Creep Lifetime Prediction Modelmentioning

confidence: 99%

A thickness‐sensitive and orientation‐related creep lifetime prediction method of nickel‐based single crystal superalloy

Zhang

Wang

Liu

et al. 2023

Fatigue Fract Eng Mat Struct

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Considering the anisotropy of nickel‐based single crystal superalloy, an anisotropic creep lifetime prediction model based on slip plane damage is developed. The predicted results indicate that the lifetime prediction model could predict the creep lifetimes of nickel‐based single crystal superalloy with different orientations accurately. Furthermore, in order to reveal the damage mechanism of nickel‐based single crystal thin‐walled specimen, creep experiment and failure analysis of thin‐walled specimen are conducted, and there are obvious differences in damage mechanisms between surface and interior of the thin‐walled specimen. In this paper, both thickness debit effect and abnormal thickness debit effect are considered to be caused by the damage differences between surface and interior of the thin‐walled specimen, and zone‐based failure criteria considering thickness debit effect and abnormal thickness debit effect are proposed. Finally, combining the anisotropic creep lifetime prediction model and zone‐based failure criteria, the creep lifetime prediction of DD6 specimen with different thickness is conducted. The predicted lifetimes are within a scatter band of factor 2.26, and the predicted laws between creep lifetimes and thicknesses of the specimens are in good agreement with the experimental results, which verifies the rationality and accuracy of the thickness‐sensitive creep lifetime prediction method established in this paper.

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“…[41], under uniaxial load, creep damage evolution could be expressed as:

{dD}_{c} goodbreak= {(1 - D_{c})}^{- m} {(\frac{σ}{A})}^{R} italicdt

Section: Anisotropic Creep Lifetime Prediction Modelmentioning

confidence: 99%

A thickness‐sensitive and orientation‐related creep lifetime prediction method of nickel‐based single crystal superalloy

Zhang

Wang

Liu

et al. 2023

Fatigue Fract Eng Mat Struct

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show abstract

“…Creep damage often occurs under the LCF loading with tensile dwell time in which the material constants for DD6 superalloy at 760 C and 980 C could be identified by fitting the data in previous studies, 17,37 as listed in Table 2. It is worth mentioning that the material constants M oct , β oct , M cub and β cub are related to the orientation factor f, which is defined as follows: Table 3.…”

Section: Lcf Lifetime Prediction Under Different Dwell Typesmentioning

confidence: 99%

“…Creep damage often occurs under the LCF loading with tensile dwell time in which the material constants for DD6 superalloy at 760°C and 980°C could be identified by fitting the data in previous studies, 17,37 as listed in Table 2. It is worth mentioning that the material constants M oct , β oct , M cub and β cub are related to the orientation factor f , which is defined as follows:

f = E_{[001]} / E_{[italichkl]},

where [ hkl ] is Miller index in material coordinate system and E [001] and E [ hkl ] are the elastic moduli at [001] orientation and [ hkl ] orientation, respectively.…”

Section: Lcf Lifetime Prediction Under Different Dwell Typesmentioning

confidence: 99%

“…It was originally employed to estimate the multiaxial lifetime for the polycrystalline material [14][15][16] and then has been developed to predict the LCF lifetime for the nickel-based single-crystal superalloy due to its clear physical meaning. 12,13,17 For the nickel-based single-crystal superalloys, the slip plane is usually chosen as the critical plane, and then the mechanical parameters on the slip plane (such as Schmid stress and shear strain) are employed to establish the lifetime prediction model. 9,[18][19][20] Although these models can reflect the anisotropy of LCF lifetimes of nickel-based single-crystal superalloys (such as PW1484 and DD6), some of the existing models are questionable to consider the influence of dwell type on LCF lifetime.…”

Section: Introductionmentioning

confidence: 99%

“…Considering the fact that the failure of material and structure usually occurs along a specific plane, critical plane method which determines the fatigue lifetime based on the mechanical parameters on the specific plane with the maximum damage was proposed. It was originally employed to estimate the multiaxial lifetime for the polycrystalline material 14–16 and then has been developed to predict the LCF lifetime for the nickel‐based single‐crystal superalloy due to its clear physical meaning 12,13,17 . For the nickel‐based single‐crystal superalloys, the slip plane is usually chosen as the critical plane, and then the mechanical parameters on the slip plane (such as Schmid stress and shear strain) are employed to establish the lifetime prediction model 9,18–20 .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Damage‐based low‐cycle fatigue lifetime prediction of nickel‐based single‐crystal superalloy considering anisotropy and dwell types

Zhang

Wang

et al. 2020

Fatigue Fract Eng Mat Struct

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Based on the physical phenomenon that the fatigue cracks initiate along specific slip plane, a slip plane damage-based low-cycle fatigue (LCF) lifetime model for the nickel-based single-crystal superalloy is established. The predicted results indicate that the lifetime model can reflect the orientation effect. In addition, in order to characterize the dwell-time dependence of the LCF lifetime, creep damage and compression-creep damage are introduced to the lifetime model. Finally, the lifetime predictions under LCF loading with tensile dwell time, compressive dwell time and tensile-compressive dwell time are conducted by employing the lifetime model, respectively. The predicted lifetimes show a good agreement with the experimental data, which verifies the accuracy of the developed lifetime model in this paper.

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Creep behavior of a film cooling hole at different inclination angles in complex temperature fields

Zhang¹,

Lv²,

Wang³

et al. 2023

Acta Mech. Sin.

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In-phase thermomechanical fatigue lifetime prediction of nickel-based single crystal superalloys from smooth specimens to notched specimens based on coupling damage on critical plane

Cited by 34 publications

References 40 publications

A thickness‐sensitive and orientation‐related creep lifetime prediction method of nickel‐based single crystal superalloy

A thickness‐sensitive and orientation‐related creep lifetime prediction method of nickel‐based single crystal superalloy

Damage‐based low‐cycle fatigue lifetime prediction of nickel‐based single‐crystal superalloy considering anisotropy and dwell types

Creep behavior of a film cooling hole at different inclination angles in complex temperature fields

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