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  Crack arrest markings in stress corrosion cracking of 7xxx aluminium alloys: Insights into active hydrogen embrittlement mechanisms

López Freixes, M., Zhou, X., Aymerich-Armengol, R., Vega-Paredes, M., Peguet, L., Warner, T., & Gault, B. (2023). Crack arrest markings in stress corrosion cracking of 7xxx aluminium alloys: Insights into active hydrogen embrittlement mechanisms. Scripta Materialia, 237:. doi:10.1016/j.scriptamat.2023.115690.

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アイテムのパーマリンク: https://hdl.handle.net/21.11116/0000-000E-437C-C 版のパーマリンク: https://hdl.handle.net/21.11116/0000-000E-437E-A
資料種別: 学術論文

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 作成者:
López Freixes, Martí1, 著者           
Zhou, Xuyang1, 2, 著者           
Aymerich-Armengol, Raquel3, 著者           
Vega-Paredes, Miquel3, 著者           
Peguet, Lionel4, 著者
Warner, Timothy4, 著者
Gault, Baptiste1, 5, 著者           
所属:
1Atom Probe Tomography, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863384              
2The University of Alabama, Department of Metallurgical Materials Engineering, 35487 Tuscaloosa, AL, USA, ou_persistent22              
3Nanoanalytics and Interfaces, Independent Max Planck Research Groups, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_2054294              
4C-TEC, Constellium Technology Center, Parc Economique Centr'alp, CS, 10027, Voreppe, 38341 cedex, France, ou_persistent22              
5Imperial College, Royal School of Mines, Department of Materials, London, SW7 2AZ, UK, ou_persistent22              

内容説明

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キーワード: Stress-corrosion cracking, Aluminum alloys, Hydrogen embrittlement, Atom probe tomography (APT), Scanning/transmission electron microscopy (STEM)
 要旨: Crack growth in stress corrosion cracking (SCC) in 7xxx Al alloys is an intermittent process, which generates successive crack arrest markings (CAMs) visible on the fracture surface. It is conjectured that H is generated at the crack tip during crack arrest, which then facilitates crack advancement through hydrogen embrittlement. Here, nanoscale imaging by 4D-scanning-transmission electron microscopy and atom probe tomography show that CAMs are produced by oxidation at the arrested crack tip, matrix precipitates dissolve and solute diffuse towards the growing CAM. Substantial homogenous residual strain remains underneath the fracture surface, indicative of non-localized plastic activity. Our study suggests that H induces crack propagation through decohesion.

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言語: eng - English
 日付: 2023-12
 出版の状態: 出版
 ページ: -
 出版情報: -
 目次: -
 査読: -
 識別子(DOI, ISBNなど): DOI: 10.1016/j.scriptamat.2023.115690
 学位: -

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出版物 1

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出版物名: Scripta Materialia
  省略形 : Scripta Mater.
種別: 学術雑誌
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出版社, 出版地: Amsterdam : Elsevier B. V.
ページ: 115690 巻号: 237 通巻号: 115690 開始・終了ページ: - 識別子(ISBN, ISSN, DOIなど): ISSN: 1359-6462
CoNE: https://pure.mpg.de/cone/journals/resource/954926243506