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Pitting corrosion analysis of stainless steel by boundary element method with strain-dependent polarization curve
http://hdl.handle.net/10098/00029255
http://hdl.handle.net/10098/00029255f79905e8-b0e3-4246-94fc-c2174e255d2f
名前 / ファイル | ライセンス | アクション |
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BD10126433 (1.4 MB)
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© 2021 WIT Press
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2022-09-28 | |||||
タイトル | ||||||
タイトル | Pitting corrosion analysis of stainless steel by boundary element method with strain-dependent polarization curve | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Pitting corrosion analysis of stainless steel by boundary element method with strain-dependent polarization curve | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | boundary element method | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | coupling problem | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | electrochemistry | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | mechanical damage | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | oxide film | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | polarization | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | stress concentration | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | stress corrosion | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_1843 | |||||
資源タイプ | other | |||||
著者 |
Kuwazuru, Osamu
× Kuwazuru, Osamu× Kawakami, Aruto× Miura, Yuma× Divo, Eduardo× Kassab, Alain |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | This study aims at evaluating the corrosion rate at the first stage of stress corrosion cracking by a numerical simulation. The stress corrosion cracking starts with a pitting corrosion which appears from a damaged portion of passive film induced by plastic deformation. From micromechanical standpoint, the stress and strain are concentrated around the grain boundaries due to the heterogeneity of micro-structures; therefore, the plastic slip occurs mainly around the grain boundaries and generates a fresh surface without passive film. This produces a microcell and affects the macroscopic polarization curve. We obtained this polarization curve of stainless steel from the open-circuit tensile tests associated with the microscopic electrostatic simulations. Moreover, this paper shows the two-dimensional formulation for coupling analysis of elastic stress and electrolytic potential. Both fields are solved by the boundary element method with the discontinuous quadratic element. The strain-dependent polarization curve is used as a nonlinear boundary condition of the potential problem. First, the elastic problem is solved to obtain the surface strain which governs the polarization curve on the surface. Next, the potential prob- lem is solved to obtain the current density on the surface which determines the corrosion rate. Since each node has two corrosion rates in different directions coming from the neighbouring elements, we average these two rates and directions, so as to conserve the volumetric reduction rate unchanged. After moving the nodes as a result of corrosion during the time step, we return to the stress analysis and iterate this procedure during the interested period of time. We demonstrate a corrosion pit growth from a small hemi-elliptic surface defect and show the availability of the proposed method. | |||||
書誌情報 |
en : International Journal of Computational Methods and Experimental Measurements 巻 9, 号 1, p. 51-62, 発行日 2021 |
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出版者 | ||||||
出版者 | WIT Press | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2046-0546 (paper format) | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2046-0554 (online) | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.2495/CMEM-V9-N1-51-62 | |||||
権利 | ||||||
権利情報 | © 2021 WIT Press | |||||
関連サイト | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://www.witpress.com/elibrary/cmem-volumes/9/1/2750 | |||||
関連名称 | WIT Press | |||||
著者版フラグ | ||||||
出版タイプ | AO | |||||
出版タイプResource | http://purl.org/coar/version/c_b1a7d7d4d402bcce | |||||
その他のID | ||||||
TD10126433 |