Quantitative analysis of hydrogen absorption in pure aluminum: Theoretical and experimental approaches

Ishii, Akio; Horikawa, Keitaro

Materialia, 2025, 764, 102449

Number of Access:162（2025-08-29 08:09 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/101957

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Title
Quantitative analysis of hydrogen absorption in pure aluminum: Theoretical and experimental approaches
Creator
NRID
1000080773340 1000080773340
ORCID
0000-0002-9369-6259 0000-0002-9369-6259
researchmap permalink
a_ishii a_ishii
Scopus Author ID
7201558020 7201558020
CreatorName
Ishii, Akio
NRID
1000050314836 1000050314836
ORCID
0000-0003-4573-9952 0000-0003-4573-9952
researchmap permalink
read0118558 read0118558
Scopus Author ID
7102628912 7102628912
CreatorName
Horikawa, Keitaro
Description
Ishii Akio, Horikawa Keitaro. Quantitative analysis of hydrogen absorption in pure aluminum : Theoretical and experimental approaches. Materialia 764, 102449 (2025); 10.1016/j.mtla.2025.102449.
Abstract
In this study, we quantitatively investigated the hydrogen absorption in pure Al under surface exposure to high-pressure hydrogen gas or water from both theoretical and experimental perspectives. From a theoretical perspective, we implemented a non-empirical multiscale analysis of the temporal evolution of hydrogen concentration in face-centered cubic Al under exposure of the (111) surface to high-pressure hydrogen gas or water using density functional theory and a recently proposed simple kinetic model. From an experimental perspective, we developed a method to introduce hydrogen onto the Al surface without an oxide layer in the presence of water by utilizing surface friction in water (FW). After the FW process, the amount of hydrogen absorbed was measured via thermal desorption analysis. The theoretical and experimental results agreed well, and the estimated hydrogen concentration in the bulk under water conditions was approximately 100 mass ppb, although we theoretically confirmed that the absorption of hydrogen in bulk Al under high-pressure hydrogen gas conditions (70 MPa) was negligible; the concentration in the bulk was only 10−6 mass ppb. We also performed a tensile test on a hydrogen-charged pure Al sample to investigate the effect of hydrogen on the tensile properties and confirmed that 100 mass ppb order hydrogen charging in Al significantly reduces the tensile strength of Al.
Publisher
Elsevier
Source Title
Materialia
Volume (Issue)
764
Page
102449
Date of Issued
2025-06-10
Language
English
Handle URL
https://hdl.handle.net/11094/101957
PISSN
25891529
Relation.isVersionOf
DOI (Publisher Version)
https://doi.org/10.1016/j.mtla.2025.102449
Access Rights
embargoed access
CopyRight
©2025. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
The full-text file will be made open to the public on 10 June 2027 in accordance with the publisher's policy.
oaire:version
Accepted Manuscript
Category
学術雑誌論文 Journal Article