Dominant Factors Controlling the Initiation of Hydrogen Embrittlement in Al–Zn–Mg Alloy
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- Toda Hiroyuki
- Department of Mechanical Engineering, Kyushu University
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- Hirayama Kyosuke
- Department of Materials Science and Engineering, Kyoto University
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- Yamaguchi Shogo
- Department of Mechanical Engineering, Kyushu University
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- Fujihara Hiro
- Department of Mechanical Engineering, Kyushu University
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- Higa Ryota
- Department of Mechanical Engineering, Kyushu University
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- Shimizu Kazuyuki
- Department of Physical Science and Materials Engineering, Iwate University
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- Takeuchi Akihisa
- Japan Synchrotron Radiation Research Institute
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- Uesugi Masayuki
- Japan Synchrotron Radiation Research Institute
Bibliographic Information
- Other Title
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- Al-Zn-Mg合金の水素脆化発生の支配因子
- Al-Zn-Mg ゴウキン ノ スイソゼイカ ハッセイ ノ シハイ インシ
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Description
<p>Surrogate-based microstructural optimization was applied to model the relationship between local crystallographic microstructure and intergranular hydrogen embrittlement in an Al–Zn–Mg alloy, and a support vector machine with an infill sampling criterion was used to realise high-accuracy optimisation with a limited data set. This methodology integrates thoroughgoing microstructural quantification, two coarsening processes, and surrogate modelling. An objective function was defined together with 66 design parameters that quantitatively express size, shape, orientation and damage during specimen machining for surface grain boundaries and grains. The number of design parameters was then reduced from 66 to 3 during the two-step coarsening process. It has been clarified that intergranular crack initiation can be described using the simple size of grains and grain boundaries together with grain boundary orientation with respect to the loading direction. It can be inferred that these design parameters are of crucial importance in crack initiation through elevation in stress normal to grain boundaries. Correlation between the selected design parameters and crack initiation was somewhat weak compared to past applications of a similar technique to particle damage. The reason for this is discussed. The present approach offers a cost-efficient solution for the prevention of hydrogen embrittlement through 3D design of crystallographic microstructure that cannot be obtained using conventional strategies for developing materials.</p>
Journal
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 64 (12), 2729-2738, 2023-12-01
The Japan Institute of Metals and Materials
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Keywords
Details 詳細情報について
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- CRID
- 1390579753342900480
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- NII Book ID
- AA1151294X
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- ISSN
- 13475320
- 18806880
- 24337501
- 13459678
- 00214876
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- HANDLE
- 2324/7160864
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- Web Site
- http://id.ndl.go.jp/bib/033193562
- https://ndlsearch.ndl.go.jp/books/R000000004-I033193562
- http://id.ndl.go.jp/bib/033449661
- https://ndlsearch.ndl.go.jp/books/R000000004-I033449661
- https://www.jstage.jst.go.jp/article/matertrans/64/12/64_MT-M2023116/_pdf
- https://www.jstage.jst.go.jp/article/jinstmet/88/3/88_J2023028/_pdf
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- Text Lang
- en
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- Data Source
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- JaLC
- IRDB
- NDL
- Crossref
- OpenAIRE
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- Abstract License Flag
- Disallowed