TY - JOUR
T1 - Identification of Hydrogen Trapping in Aluminum Alloys Via Muon Spin Relaxation Method and First-Principles Calculations
AU - Tsuru, Tomohito
AU - Nishimura, Katsuhiko
AU - Matsuda, Kenji
AU - Nunomura, Noiro
AU - Namiki, Takahiro
AU - Lee, Seungwon
AU - Higemoto, Wataru
AU - Matsuzaki, Teiichiro
AU - Yamaguchi, Masatake
AU - Ebihara, Kenichi
AU - Shimizu, Kazuyuki
AU - Toda, Hiroyuki
N1 - Publisher Copyright:
© 2023, The Minerals, Metals & Materials Society and ASM International.
PY - 2023/6
Y1 - 2023/6
N2 - Although hydrogen embrittlement susceptibility of high-strength Al alloys is recognized as a critical issue in the practical use of Al alloys, identifying the hydrogen trapping or distribution has been challenging. In the present study, an effective approach based on experiment and simulation is proposed to explore the potential trap sites in Al alloys. At first, zero-field muon spin relaxation experiments were implemented in the temperature range from 5 K to 300 K. The plot of the temperature dependence of dipole field widths (∆) provides several characteristic peaks corresponding to the hydrogen trapping. Four dilute Al alloys (Al–Mg, Al–Cu, Al–Ti, and Al–V) were chosen to explore the possible trap sites. Atomic configurations of the muon trapping sites corresponding to the observed ∆ peaks are well assigned using the first-principles calculations for the binding energies of hydrogen around a solute and solute-vacancy pair. The extracted linear relationship between the muon ∆ peak temperature and the binding energy enables us to explore the potential alloying elements and their complex that have strong binding energies with hydrogen in Al alloys.
AB - Although hydrogen embrittlement susceptibility of high-strength Al alloys is recognized as a critical issue in the practical use of Al alloys, identifying the hydrogen trapping or distribution has been challenging. In the present study, an effective approach based on experiment and simulation is proposed to explore the potential trap sites in Al alloys. At first, zero-field muon spin relaxation experiments were implemented in the temperature range from 5 K to 300 K. The plot of the temperature dependence of dipole field widths (∆) provides several characteristic peaks corresponding to the hydrogen trapping. Four dilute Al alloys (Al–Mg, Al–Cu, Al–Ti, and Al–V) were chosen to explore the possible trap sites. Atomic configurations of the muon trapping sites corresponding to the observed ∆ peaks are well assigned using the first-principles calculations for the binding energies of hydrogen around a solute and solute-vacancy pair. The extracted linear relationship between the muon ∆ peak temperature and the binding energy enables us to explore the potential alloying elements and their complex that have strong binding energies with hydrogen in Al alloys.
UR - http://www.scopus.com/inward/record.url?scp=85150182662&partnerID=8YFLogxK
U2 - 10.1007/s11661-023-07024-w
DO - 10.1007/s11661-023-07024-w
M3 - 学術論文
AN - SCOPUS:85150182662
SN - 1073-5623
VL - 54
SP - 2374
EP - 2383
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
IS - 6
ER -