Mechanisms of hydrogen absorption, trapping and release during galvanostatic anodization of high-strength aluminum alloys
The initial growth of a porous alumina layer and the hydrogen absorption during galvanostatic anodization were studied using high-resolution electron microscopy, thermal desorption spectroscopy, and hydrogen microprint technique. The nanostructure of the alumina layer depends strongly on the anodiza...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422018166 |
| _version_ | 1797943115992006656 |
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| author | Mahdieh Safyari Gregor Mori Stephan Ucsnik Masoud Moshtaghi |
| author_facet | Mahdieh Safyari Gregor Mori Stephan Ucsnik Masoud Moshtaghi |
| author_sort | Mahdieh Safyari |
| collection | DOAJ |
| description | The initial growth of a porous alumina layer and the hydrogen absorption during galvanostatic anodization were studied using high-resolution electron microscopy, thermal desorption spectroscopy, and hydrogen microprint technique. The nanostructure of the alumina layer depends strongly on the anodization time. The embryo of pores grows as the thickness of the oxide layer increases, and a porous alumina layer is formed until the voltage reached its maximum value. Eventually, the connected pores to the substrate appear in a steady-state voltage region that acted as hydrogen pathways. The substrate does not show delayed embrittlement after the early and late stages of anodization, which is attributed to the low amount of absorbed hydrogen during the anodization. In the middle stage of the anodization, a higher amount of hydrogen is trapped in the substrate/layer interface and then migrates inward into the alloy when the specimen is subjected to stress resulting in delayed hydrogen embrittlement. |
| first_indexed | 2024-04-10T20:18:10Z |
| format | Article |
| id | doaj.art-c2799b8db9b945e08f26bf2776af9a5d |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-10T20:18:10Z |
| publishDate | 2023-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-c2799b8db9b945e08f26bf2776af9a5d2023-01-26T04:45:32ZengElsevierJournal of Materials Research and Technology2238-78542023-01-01228088Mechanisms of hydrogen absorption, trapping and release during galvanostatic anodization of high-strength aluminum alloysMahdieh Safyari0Gregor Mori1Stephan Ucsnik2Masoud Moshtaghi3LKR Light Metals Technologies Ranshofen, Austrian Institute of Technology, 5282 Ranshofen, Austria; Chair of General and Analytical Chemistry, Montanuniversität Leoben, Franz Josef-Straße 18, 8700, Leoben, Austria; Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan; Corresponding author.Chair of General and Analytical Chemistry, Montanuniversität Leoben, Franz Josef-Straße 18, 8700, Leoben, AustriaLKR Light Metals Technologies Ranshofen, Austrian Institute of Technology, 5282 Ranshofen, AustriaChair of General and Analytical Chemistry, Montanuniversität Leoben, Franz Josef-Straße 18, 8700, Leoben, Austria; Corresponding author.The initial growth of a porous alumina layer and the hydrogen absorption during galvanostatic anodization were studied using high-resolution electron microscopy, thermal desorption spectroscopy, and hydrogen microprint technique. The nanostructure of the alumina layer depends strongly on the anodization time. The embryo of pores grows as the thickness of the oxide layer increases, and a porous alumina layer is formed until the voltage reached its maximum value. Eventually, the connected pores to the substrate appear in a steady-state voltage region that acted as hydrogen pathways. The substrate does not show delayed embrittlement after the early and late stages of anodization, which is attributed to the low amount of absorbed hydrogen during the anodization. In the middle stage of the anodization, a higher amount of hydrogen is trapped in the substrate/layer interface and then migrates inward into the alloy when the specimen is subjected to stress resulting in delayed hydrogen embrittlement.http://www.sciencedirect.com/science/article/pii/S2238785422018166Aluminum alloysHydrogen embrittlementAnodizationNanoporesHydrogen trapping |
| spellingShingle | Mahdieh Safyari Gregor Mori Stephan Ucsnik Masoud Moshtaghi Mechanisms of hydrogen absorption, trapping and release during galvanostatic anodization of high-strength aluminum alloys Journal of Materials Research and Technology Aluminum alloys Hydrogen embrittlement Anodization Nanopores Hydrogen trapping |
| title | Mechanisms of hydrogen absorption, trapping and release during galvanostatic anodization of high-strength aluminum alloys |
| title_full | Mechanisms of hydrogen absorption, trapping and release during galvanostatic anodization of high-strength aluminum alloys |
| title_fullStr | Mechanisms of hydrogen absorption, trapping and release during galvanostatic anodization of high-strength aluminum alloys |
| title_full_unstemmed | Mechanisms of hydrogen absorption, trapping and release during galvanostatic anodization of high-strength aluminum alloys |
| title_short | Mechanisms of hydrogen absorption, trapping and release during galvanostatic anodization of high-strength aluminum alloys |
| title_sort | mechanisms of hydrogen absorption trapping and release during galvanostatic anodization of high strength aluminum alloys |
| topic | Aluminum alloys Hydrogen embrittlement Anodization Nanopores Hydrogen trapping |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422018166 |
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