Fatigue and ratcheting assessment of AISI H11 at 500°C using constitutive theory coupled with damage rule

Ma, Lifeng; Luo, Yan; Wang, Y.; Du, Weiqi; Song, Zhuolun; Zhang, J.

doi:10.1111/ffe.12724

Cited by 10 publications

(6 citation statements)

References 31 publications

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“…Hence, the proposed isotropic hardening rule is used as follows. [ 28 ]

Q = Q_{0} + Q_{a} [1 - \exp (Q_{b} p)] + Q_{c} p

where Q is the isotropic hardening internal variable denoting the size change in yield surface due to plastic flow.

Q_{0}

is the initial size of the yield surface,

Q_{a}, Q_{b}, Q_{c}

are the parameters of the material, and

Q_{b}

controls the rate of reaching the saturation.…”

Section: Mechanical Behavior Characterizationmentioning

confidence: 99%

High‐Temperature Mechanical Behavior Assessment based on a Developed Constitutive Model of Inconel 718 Fabricated by Selective Laser Melting

Zhang

Guo

et al. 2021

Adv Eng Mater

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Inconel 718, a typical nickel‐based superalloy, is widely used to fabricate high‐temperature components in aerospace and power industries. Conventional “subtractive” processes confront numerous problems due to the complicated structures. The application of selective laser melting (SLM), as one of the additive manufacturing (AM) techniques, is promising in part fabrication and repairment in the aerospace industry. Tensile tests with different strain rates and strain‐controlled cycling tests with different strain amplitudes are conducted in this study at a high temperature of 600 °C to assess the mechanical behavior of SLM‐built Inconel 718 and reinforce its application. Experimental data reveal that a relatively concise constitutive model incorporating damage is proposed on the basis of Chaboche's framework. Modifications to isotropic hardening and damage evolution rules are performed to embed lifetime prediction capacity. Simulated results achieve a good agreement with the experimental results. Microstructures of fatigue fracture surface are analyzed to further understand the fracture mechanism. The results show that both intergranular and intragranular fracture modes and the dimples signify ductility. Overall, this study presents significant techno‐economic implications in assessing the competence of SLM‐built Inconel 718 components used in real serving conditions and also provides a reference to improve the SLM preparation process.

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“…Hence, the proposed isotropic hardening rule is used as follows. [ 28 ]

Q = Q_{0} + Q_{a} [1 - \exp (Q_{b} p)] + Q_{c} p

where Q is the isotropic hardening internal variable denoting the size change in yield surface due to plastic flow.

Q_{0}

is the initial size of the yield surface,

Q_{a}, Q_{b}, Q_{c}

are the parameters of the material, and

Q_{b}

controls the rate of reaching the saturation.…”

Section: Mechanical Behavior Characterizationmentioning

confidence: 99%

High‐Temperature Mechanical Behavior Assessment based on a Developed Constitutive Model of Inconel 718 Fabricated by Selective Laser Melting

Zhang

Guo

et al. 2021

Adv Eng Mater

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“…The cyclic hardening and softening can usually be found in high temperature cyclic response . Isotropic hardening rule is then to describe the mechanical properties from hardening to softening:

Q = Q_{o} + Q_{a} ([], 1 - exp ((), Q_{b} p)) + Q_{c} p

where Q is the isotropic hardening internal variable denoting the change of yield surface size due to plastic flow, and Q a , Q b , and Q c are parameters of the material.…”

Section: Experiments Combining With Fe Analysismentioning

confidence: 99%

“…Since the constitutive model of AISI H11 at 500°C has been established in previous study, the corresponding parameters are then presented directly in Tables and in this work. The details of experiment and simulation of cyclic stress‐strain behavior can be seen in Ma et al For this example, only the elastic module E , ultimate tensile strength σ u , and initial yield stress Q 0 ( σ y ), which are considered basic material properties, are assumed to be random variable for simplicity. These three random material parameters will be sampled and then be written into UMAT for each FE model.…”

Section: Engineering Applicationmentioning

confidence: 99%

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A general framework for fatigue reliability analysis of a high temperature component

Luo

Wang

et al. 2018

Quality & Reliability Eng

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Fatigue reliability analysis for a high temperature component is a complex task due to the difficulties of doing experiments and uncertainties occurring in practical engineering. Researchers usually focus on the fatigue life scatter of standard specimens since the life data are easily available from fatigue tests. An alternative method is proposed in this paper which can replace the real tests of high temperature components with finite element (FE) simulation. A constitutive model coupled damage rule is utilized in this work to describe the cyclic stress‐strain response. Then, the FE simulations is incorporated into the general framework for reliability assessment. An adaptive least squares support vector machines with Latin hypercube sampling and learning function is employed to construct limit state function. To verify the accuracy and robustness of proposed method, a numerical example is utilized. In the end of this paper, a three‐layer structure extrusion container is applied for whole flowchart of fatigue reliability analysis.

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“…The cyclic plasticity and creep models for metal materials have been developed for decades [4][5][6][7]. These models can provide precise modeling and prediction for the complex deformation response and damage evaluation [7,8]. Moreover, the further theoretical research for the physical basis of the models was conducted, including the energy evolution under the framework of thermodynamics [9,10].…”

Section: Introductionmentioning

confidence: 99%

A Thermodynamically-based Modeling for the Creep and Plasticity of Al 5083 Alloy

Meng

Chen²

2023

J. Phys.: Conf. Ser.

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To ensure a thermodynamic consistency for a constitutive model is a higher request for modeling the mechanical behaviors of materials. This paper conducts a thermodynamic analysis for a creep-plasticity model for Al 5083 alloy. The constitutive equations are derived from the fundamental thermodynamic laws, maintaining a rigorous physical basis of the proposed model. The monotonic tensile and creep tests are introduced for modeling, illustrating the rationality and accuracy of the proposed model.

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Fatigue and ratcheting assessment of AISI H11 at 500°C using constitutive theory coupled with damage rule

Cited by 10 publications

References 31 publications

High‐Temperature Mechanical Behavior Assessment based on a Developed Constitutive Model of Inconel 718 Fabricated by Selective Laser Melting

High‐Temperature Mechanical Behavior Assessment based on a Developed Constitutive Model of Inconel 718 Fabricated by Selective Laser Melting

A general framework for fatigue reliability analysis of a high temperature component

A Thermodynamically-based Modeling for the Creep and Plasticity of Al 5083 Alloy

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