Influence of anelastic recovery on the cyclic creep behavior of AlCoCrFeNi2.1 eutectic high-entropy alloy

Lu, Chuanyang; Wang, Peng; Luo, Siyu; Li, Yafei; Wang, Run-Zi; He, Yanming; Gao, Zengliang; Tu, Shan-Tung

doi:10.1016/j.ijfatigue.2023.108111

International Journal of Fatigue

2024

DOI: 10.1016/j.ijfatigue.2023.108111

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Influence of anelastic recovery on the cyclic creep behavior of AlCoCrFeNi2.1 eutectic high-entropy alloy

Chuanyang Lu,

Peng Wang,

Siyu Luo

et al.

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Cited by 3 publications

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Exceptional cryogenic impact and fatigue properties of additively manufactured CrCoNi medium entropy alloy

Hwang,

Tran,

Dang

et al. 2025

International Journal of Fatigue

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Exceptional cryogenic impact and fatigue properties of additively manufactured CrCoNi medium entropy alloy

Hwang,

Tran,

Dang

et al. 2025

International Journal of Fatigue

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Creep damage evolution by cavity nucleation and growth considering the cavity closure under cyclic loading conditions

Xu,

Cheng,

et al. 2024

Fatigue Fract Eng Mat Struct

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Creep damage assessment is crucial for ensuring the long‐term reliability of key components operating at high temperatures. However, the existing studies on creep damage are mainly focused on constant loading conditions, while the effect of cyclic loading, which is a common loading mode in practice, remains unclear. In this paper, a series of stress‐controlled cyclic creep tests on the Inconel 718 superalloy were performed to investigate the influence of cyclic loading on creep damage evolution. The ex‐situ microstructural analyses, including fracture surface observations and EBSD measurements, were conducted to reveal the damage mechanisms under cyclic creep conditions. Furthermore, a cavity nucleation and growth model that accounts for the additional cavity closure was developed for the healing effect of cyclic creep damage evolution. The prediction results were consistent with the experimental data of cavity nucleation life and experimental life within a factor of 2.

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Plastic Shakedown Behavior and Deformation Mechanisms of Ti17 Alloy under Long Term Creep–Fatigue Loading

Wang,

Man,

Liu

et al. 2024

Metals

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Ti17 alloy is mainly used to manufacture aero-engine discs due to its excellent properties such as high strength, toughness and hardenability. It is often subjected to creep–fatigue cyclic loading in service environments. Shakedown theory describes the state in which the accumulated plastic strain of the material stabilizes after several cycles of cyclic loading, without affecting its initial function and leading to failure. This theory includes three behaviors: elastic shakedown, plastic shakedown and ratcheting. In this paper, the creep–fatigue tests (CF) were conducted on Ti17 alloy at 300 °C to study its shakedown behavior under creep–fatigue cyclic loading. Based on the plasticity–creep superposition model, a theory model that accurately describes the shakedown behavior of Ti17 alloy was constructed, and ABAQUS finite element software was used to validate the accuracy of the model. TEM analysis was performed to observe the micro-mechanisms of shakedown in Ti17 alloy. The results reveal that the Ti17 alloy specimens exhibit plastic shakedown behavior after three cycles of creep–fatigue loading. The established finite element model can effectively predict the plastic shakedown process of Ti17 alloy, with a relative error between the experimental and simulation results within 4%. TEM results reveal that anelastic recovery controlled by dislocation bending and back stress hardening caused by inhomogeneous deformation are the main mechanisms for the plastic shakedown behavior of Ti17 alloy.

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Influence of anelastic recovery on the cyclic creep behavior of AlCoCrFeNi2.1 eutectic high-entropy alloy

Cited by 3 publications

References 51 publications

Exceptional cryogenic impact and fatigue properties of additively manufactured CrCoNi medium entropy alloy

Exceptional cryogenic impact and fatigue properties of additively manufactured CrCoNi medium entropy alloy

Creep damage evolution by cavity nucleation and growth considering the cavity closure under cyclic loading conditions

Plastic Shakedown Behavior and Deformation Mechanisms of Ti17 Alloy under Long Term Creep–Fatigue Loading

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