Hydrogen Induced Debonding of Mg<sub>2</sub>Si Particle/Aluminum Interface in Al-Mg-Si Alloy
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- Toda Hiroyuki
- Department of Mechanical Engineering, Kyushu University
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- Fujihara Hiro
- Department of Mechanical Engineering, Kyushu University
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- Hirayama Kyosuke
- Department of Materials Science and Engineering, Kyoto University
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- Shimizu Kazuyuki
- Department of Physical Science and Materials Engineering, Iwate University
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- Wang Yafei
- Department of Mechanical Engineering, Kyushu University
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- Bhupendra Sharma
- Department of Mechanical Engineering, Kyushu University
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- Tang Jianwei
- Department of Mechanical Engineering, Kyushu 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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- Hydrogen Induced Debonding of Mg₂Si Particle/Aluminum Interface in Al-Mg-Si Alloy
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Description
<p>Recent research has shown that some intermetallic compound particles with high interfacial hydrogen trap energies (e.g., Mg2Si) are prone to damage at high hydrogen concentrations. In this study, the acceleration of particle damage in an A6061 alloy was observed in-situ via X-ray CT. The damage behavior of the particles that are located in the crack tip stress field, where high stress triaxiality causes a local increase in the hydrogen concentration, was analyzed. The influence of hydrogen on the damage behavior of the dispersed Mg2Si particles was investigated by preparing a material charged with hydrogen to achieve extremely high hydrogen concentration, and further hydrogen enrichment in a crack tip region was also utilized. Interfacial debonding of Mg2Si particles was frequently observed in the vicinity of a crack tip immediately prior to tensile fracture. Even though the fracture is typical of ductile fracture, hydrogen accelerates particle damage and reduces the macroscopic ductility of the aluminum alloy. This can be considered as a form of hydrogen embrittlement of aluminum alloys. Even in materials with relatively low hydrogen concentrations (0.85 mass ppm), interfacial debonding occurred in the hydrogen-enriched crack tip regions. A higher hydrogen concentration promoted interfacial debonding over a wider range of particle sizes and particle shapes. It can be inferred that localized hydrogen enrichment, which is expected to occur due to external hydrogen exposure, stress corrosion cracking, corrosion or crack tips, can directly contribute to debonding at the Mg2Si particle/aluminum matrix interface. According to the analysis, reduction of the diameter and simplification of the shape of Mg2Si particles are effective method for suppressing such hydrogen-induced debonding.</p>
Journal
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 65 (7), 763-772, 2024-07-01
The Japan Institute of Metals and Materials
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Details 詳細情報について
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- CRID
- 1390863550796916480
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- NII Book ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- HANDLE
- 2324/7234367
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- NDL BIB ID
- 033575842
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- Text Lang
- en
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- Data Source
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- JaLC
- IRDB
- NDL Search
- Crossref
- OpenAIRE
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- Abstract License Flag
- Disallowed
