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A Unified Temperature‐Dependent Constitutive Model for Haynes 230 Alloy for High Temperature Fatigue and Creep Analysis.

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Title: A Unified Temperature‐Dependent Constitutive Model for Haynes 230 Alloy for High Temperature Fatigue and Creep Analysis.
Authors: Du, Rou1 (AUTHOR), Liu, Qiang2 (AUTHOR), Li, Nan2 (AUTHOR), Wei, Yueguang3 (AUTHOR), Liu, Xiaoming1,4 (AUTHOR) xiaomingliu@imech.ac.cn
Source: Fatigue & Fracture of Engineering Materials & Structures. May2026, Vol. 49 Issue 5, p2038-2053. 16p.
Subjects: Creep testing, Stress relaxation tests, Alloys, Bayesian analysis, Thermal fatigue, Material fatigue, Axial stresses
Abstract: The Haynes 230 alloy is a candidate structural material for the high‐temperature components in advanced nuclear and energy systems because of its excellent creep resistance and oxidation resistance. However, accurately modeling its inelastic behavior, including rate‐independent cyclic plasticity, rate‐dependent creep, and stress relaxation under multi‐axial loading and different temperatures, remains challenging. This study presents a temperature‐dependent unified constitutive model, in which the nonlinear kinematic hardening incorporates the thermally activated static recovery term. A Kocks–Mecking‐based rate‐regime transition links the plastic and viscous deformation regimes. Model parameters are determined via a hybrid calibration strategy: Elastic and hardening terms are directly calibrated, while static recovery parameters are inversely identified using the Bayesian inference method based on creep and relaxation test data. The model is validated against uniaxial tension, low‐cycle fatigue, creep, stress relaxation, and multiaxial notched specimen tests. The close agreement between predictions and experiments demonstrates the model's robustness and applicability for structural integrity assessment of high‐temperature components under complex thermomechanical conditions. Summary: Developed a unified model for the complex loading conditions of Haynes 230Used hybrid calibration with direct fitting and Bayesian inference for parametersValidated the model by tensile, fatigue, creep, relaxation, and multiaxial tests [ABSTRACT FROM AUTHOR]
Copyright of Fatigue & Fracture of Engineering Materials & Structures is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 192816795
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  Label: Title
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  Data: A Unified Temperature‐Dependent Constitutive Model for Haynes 230 Alloy for High Temperature Fatigue and Creep Analysis.
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  Data: <searchLink fieldCode="AR" term="%22Du%2C+Rou%22">Du, Rou</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Qiang%22">Liu, Qiang</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Nan%22">Li, Nan</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wei%2C+Yueguang%22">Wei, Yueguang</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Xiaoming%22">Liu, Xiaoming</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)<i> xiaomingliu@imech.ac.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Fatigue+%26+Fracture+of+Engineering+Materials+%26+Structures%22">Fatigue & Fracture of Engineering Materials & Structures</searchLink>. May2026, Vol. 49 Issue 5, p2038-2053. 16p.
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  Data: <searchLink fieldCode="DE" term="%22Creep+testing%22">Creep testing</searchLink><br /><searchLink fieldCode="DE" term="%22Stress+relaxation+tests%22">Stress relaxation tests</searchLink><br /><searchLink fieldCode="DE" term="%22Alloys%22">Alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Bayesian+analysis%22">Bayesian analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+fatigue%22">Thermal fatigue</searchLink><br /><searchLink fieldCode="DE" term="%22Material+fatigue%22">Material fatigue</searchLink><br /><searchLink fieldCode="DE" term="%22Axial+stresses%22">Axial stresses</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The Haynes 230 alloy is a candidate structural material for the high‐temperature components in advanced nuclear and energy systems because of its excellent creep resistance and oxidation resistance. However, accurately modeling its inelastic behavior, including rate‐independent cyclic plasticity, rate‐dependent creep, and stress relaxation under multi‐axial loading and different temperatures, remains challenging. This study presents a temperature‐dependent unified constitutive model, in which the nonlinear kinematic hardening incorporates the thermally activated static recovery term. A Kocks–Mecking‐based rate‐regime transition links the plastic and viscous deformation regimes. Model parameters are determined via a hybrid calibration strategy: Elastic and hardening terms are directly calibrated, while static recovery parameters are inversely identified using the Bayesian inference method based on creep and relaxation test data. The model is validated against uniaxial tension, low‐cycle fatigue, creep, stress relaxation, and multiaxial notched specimen tests. The close agreement between predictions and experiments demonstrates the model's robustness and applicability for structural integrity assessment of high‐temperature components under complex thermomechanical conditions. Summary: Developed a unified model for the complex loading conditions of Haynes 230Used hybrid calibration with direct fitting and Bayesian inference for parametersValidated the model by tensile, fatigue, creep, relaxation, and multiaxial tests [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Fatigue & Fracture of Engineering Materials & Structures is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1111/ffe.70235
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      – Code: eng
        Text: English
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        PageCount: 16
        StartPage: 2038
    Subjects:
      – SubjectFull: Creep testing
        Type: general
      – SubjectFull: Stress relaxation tests
        Type: general
      – SubjectFull: Alloys
        Type: general
      – SubjectFull: Bayesian analysis
        Type: general
      – SubjectFull: Thermal fatigue
        Type: general
      – SubjectFull: Material fatigue
        Type: general
      – SubjectFull: Axial stresses
        Type: general
    Titles:
      – TitleFull: A Unified Temperature‐Dependent Constitutive Model for Haynes 230 Alloy for High Temperature Fatigue and Creep Analysis.
        Type: main
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          Name:
            NameFull: Du, Rou
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            NameFull: Liu, Qiang
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            NameFull: Li, Nan
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            NameFull: Wei, Yueguang
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            NameFull: Liu, Xiaoming
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            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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              Value: 49
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            – TitleFull: Fatigue & Fracture of Engineering Materials & Structures
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