Hydrogen trapping and embrittlement susceptibility in Al-Cu-Li alloys

Xiaoya Wang; Guoai Li; Qiyao He; Enhui Xiao; Jiantang Jiang; Wenzhu Shao; Liang Zhen

doi:10.1016/j.corsci.2023.111628

Hydrogen trapping and embrittlement susceptibility in Al-Cu-Li alloys

Xiaoya Wang
, Guoai Li
, Qiyao He
, Enhui Xiao
, Jiantang Jiang^*
, Wenzhu Shao
, Liang Zhen^*

^*Corresponding author for this work

School of Materials Science and Engineering

Harbin Institute of Technology Shenzhen
Beijing Institute of Aeronautical Materials
Harbin Institute of Technology
Harbin Institute of Technology (Shenzhen)

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

The third-generation Al–Cu–Li alloys are found to show little susceptibility to hydrogen embrittlement (HE). Atom probe tomography analysis shows that the primary strengthening precipitate in the alloys, namely T₁ (Al₂CuLi) phase, is a strong hydrogen trap. The T₁ phase is segregated by 1.5 at% of H on average at T6 ageing state. Specially, hydrogen is trapped in the interior of T₁ phase so that interfacial decohesion is limited. The presence of T₁ phase with high trapping capacity and large number density suppresses the H transport toward the grain boundaries, primarily contributing to the high resistance to HE.

Original language	English
Article number	111628
Journal	Corrosion Science
Volume	226
DOIs	https://doi.org/10.1016/j.corsci.2023.111628
State	Published - Jan 2024

Keywords

Al-Cu-Li alloys
Atom probe tomography
Hydrogen embrittlement
Hydrogen trap
T phase

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10.1016/j.corsci.2023.111628

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@article{693a852cd79c46ed97851a9ec283c79f,

title = "Hydrogen trapping and embrittlement susceptibility in Al-Cu-Li alloys",

abstract = "The third-generation Al–Cu–Li alloys are found to show little susceptibility to hydrogen embrittlement (HE). Atom probe tomography analysis shows that the primary strengthening precipitate in the alloys, namely T1 (Al2CuLi) phase, is a strong hydrogen trap. The T1 phase is segregated by 1.5 at\% of H on average at T6 ageing state. Specially, hydrogen is trapped in the interior of T1 phase so that interfacial decohesion is limited. The presence of T1 phase with high trapping capacity and large number density suppresses the H transport toward the grain boundaries, primarily contributing to the high resistance to HE.",

keywords = "Al-Cu-Li alloys, Atom probe tomography, Hydrogen embrittlement, Hydrogen trap, T phase",

author = "Xiaoya Wang and Guoai Li and Qiyao He and Enhui Xiao and Jiantang Jiang and Wenzhu Shao and Liang Zhen",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier Ltd",

year = "2024",

month = jan,

doi = "10.1016/j.corsci.2023.111628",

language = "英语",

volume = "226",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Hydrogen trapping and embrittlement susceptibility in Al-Cu-Li alloys

AU - Wang, Xiaoya

AU - Li, Guoai

AU - He, Qiyao

AU - Xiao, Enhui

AU - Jiang, Jiantang

AU - Shao, Wenzhu

AU - Zhen, Liang

PY - 2024/1

Y1 - 2024/1

N2 - The third-generation Al–Cu–Li alloys are found to show little susceptibility to hydrogen embrittlement (HE). Atom probe tomography analysis shows that the primary strengthening precipitate in the alloys, namely T1 (Al2CuLi) phase, is a strong hydrogen trap. The T1 phase is segregated by 1.5 at% of H on average at T6 ageing state. Specially, hydrogen is trapped in the interior of T1 phase so that interfacial decohesion is limited. The presence of T1 phase with high trapping capacity and large number density suppresses the H transport toward the grain boundaries, primarily contributing to the high resistance to HE.

AB - The third-generation Al–Cu–Li alloys are found to show little susceptibility to hydrogen embrittlement (HE). Atom probe tomography analysis shows that the primary strengthening precipitate in the alloys, namely T1 (Al2CuLi) phase, is a strong hydrogen trap. The T1 phase is segregated by 1.5 at% of H on average at T6 ageing state. Specially, hydrogen is trapped in the interior of T1 phase so that interfacial decohesion is limited. The presence of T1 phase with high trapping capacity and large number density suppresses the H transport toward the grain boundaries, primarily contributing to the high resistance to HE.

KW - Al-Cu-Li alloys

KW - Atom probe tomography

KW - Hydrogen embrittlement

KW - Hydrogen trap

KW - T phase

UR - https://www.scopus.com/pages/publications/85176209894

U2 - 10.1016/j.corsci.2023.111628

DO - 10.1016/j.corsci.2023.111628

M3 - 文章

AN - SCOPUS:85176209894

SN - 0010-938X

VL - 226

JO - Corrosion Science

JF - Corrosion Science

M1 - 111628

ER -

Hydrogen trapping and embrittlement susceptibility in Al-Cu-Li alloys

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Keywords

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