LAPSE:2023.26176
Published Article
LAPSE:2023.26176
Inelastic Material Models of Type 316H for Elevated Temperature Design of Advanced High Temperature Reactors
Gyeong-Hoi Koo, Ji-Hyun Yoon
March 31, 2023
In this paper, the inelastic material models for Type 316H stainless steel, which is one of the principal candidate materials for elevated temperature design of the advanced high temperature reactors (HTRs) pressure retained components, are investigated and the required material parameters are identified to be used for both elasto-plastic models and unified viscoplastic models. In the constitutive equations of the inelastic material models, the kinematic hardening behavior is expressed with the Chaboche model with three backstresses, and the isotropic hardening behavior is expressed by the Voce model. The required number of material parameters is minimized to be ten in total. For the unified viscoplastic model, which can express both the time-independent plastic behavior and the time-dependent viscous behavior, the constitutive equations have the same kinematic and isotropic hardening parameters of the elasto-plastic material model with two additional viscous parameters. To identify the material parameters required for these constitutive equations, various uniaxial tests were carried out at isothermal conditions at room temperature and an elevated temperature range of 425−650 °C. The identified inelastic material parameters were validated through the comparison between tests and calculations.
Keywords
elasto-plastic, elevated temperature, inelastic material model, isotropic hardening, kinematic hardening, material parameter, nuclear power, Type 316H, viscoplastic
Subject
Suggested Citation
Koo GH, Yoon JH. Inelastic Material Models of Type 316H for Elevated Temperature Design of Advanced High Temperature Reactors. (2023). LAPSE:2023.26176
Author Affiliations
Koo GH: Korea Atomic Energy Research Institute, Daejeon 34057, Korea
Yoon JH: Korea Atomic Energy Research Institute, Daejeon 34057, Korea
Journal Name
Energies
Volume
13
Issue
17
Article Number
E4548
Year
2020
Publication Date
2020-09-02
Published Version
ISSN
1996-1073
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Original Submission
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PII: en13174548, Publication Type: Journal Article
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LAPSE:2023.26176
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doi:10.3390/en13174548
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