Unraveling the effect of dislocations and deformation-induced boundaries on environmental hydrogen embrittlement behavior of a cold-rolled Al–Zn–Mg–Cu alloy

Masoud Moshtaghi; Mahdieh Safyari; Shigeru Kuramoto; Tomohiko Hojo

doi:10.1016/j.ijhydene.2020.12.028

Unraveling the effect of dislocations and deformation-induced boundaries on environmental hydrogen embrittlement behavior of a cold-rolled Al–Zn–Mg–Cu alloy

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Unraveling the effect of dislocations and deformation-induced boundaries on environmental hydrogen embrittlement behavior of a cold-rolled Al–Zn–Mg–Cu alloy. / Moshtaghi, Masoud; Safyari, Mahdieh; Kuramoto, Shigeru et al.
In: International Journal of Hydrogen Energy , Vol. 46.2021, No. 11, 11.02.2021, p. 8285-8299.

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

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@article{e1410b1148ee45218d3e68f719ae2ec9,

title = "Unraveling the effect of dislocations and deformation-induced boundaries on environmental hydrogen embrittlement behavior of a cold-rolled Al–Zn–Mg–Cu alloy",

abstract = "The effect of dislocation substructure, and deformation-induced boundaries on the hydrogen embrittlement (HE) behavior and the fracture mechanism of a 7xxx series aluminum alloy was investigated using X-ray diffraction line-profile analysis, electron backscatter diffraction, transmission electron microscopy, thermal desorption spectroscopy, and visualization of hydrogen. Hydrogen resides at interstitial lattice sites, statistically-stored dislocations (SSDs), and high-angle boundaries (HABs). SSDs are not the main trap site affecting HE behavior of the alloy. However, the HABs with the high desorption energy act as an almost irreversible trap site, which strongly absorbs hydrogen. It was firstly reported that the higher density of HABs as a strong trap site in a deformed 7xxx series aluminum alloy leads to decreasing the possibility of building up a critical hydrogen concentration required for crack initiation in a typical HAB, resulting in an excellent hydrogen embrittlement resistance.",

author = "Masoud Moshtaghi and Mahdieh Safyari and Shigeru Kuramoto and Tomohiko Hojo",

note = "Publisher Copyright: {\textcopyright} 2020 Hydrogen Energy Publications LLC",

year = "2021",

month = feb,

day = "11",

doi = "10.1016/j.ijhydene.2020.12.028",

language = "English",

volume = "46.2021",

pages = "8285--8299",

journal = "International Journal of Hydrogen Energy ",

issn = "0360-3199",

publisher = "Elsevier",

number = "11",

}

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TY - JOUR

T1 - Unraveling the effect of dislocations and deformation-induced boundaries on environmental hydrogen embrittlement behavior of a cold-rolled Al–Zn–Mg–Cu alloy

AU - Moshtaghi, Masoud

AU - Safyari, Mahdieh

AU - Kuramoto, Shigeru

AU - Hojo, Tomohiko

PY - 2021/2/11

Y1 - 2021/2/11

N2 - The effect of dislocation substructure, and deformation-induced boundaries on the hydrogen embrittlement (HE) behavior and the fracture mechanism of a 7xxx series aluminum alloy was investigated using X-ray diffraction line-profile analysis, electron backscatter diffraction, transmission electron microscopy, thermal desorption spectroscopy, and visualization of hydrogen. Hydrogen resides at interstitial lattice sites, statistically-stored dislocations (SSDs), and high-angle boundaries (HABs). SSDs are not the main trap site affecting HE behavior of the alloy. However, the HABs with the high desorption energy act as an almost irreversible trap site, which strongly absorbs hydrogen. It was firstly reported that the higher density of HABs as a strong trap site in a deformed 7xxx series aluminum alloy leads to decreasing the possibility of building up a critical hydrogen concentration required for crack initiation in a typical HAB, resulting in an excellent hydrogen embrittlement resistance.

AB - The effect of dislocation substructure, and deformation-induced boundaries on the hydrogen embrittlement (HE) behavior and the fracture mechanism of a 7xxx series aluminum alloy was investigated using X-ray diffraction line-profile analysis, electron backscatter diffraction, transmission electron microscopy, thermal desorption spectroscopy, and visualization of hydrogen. Hydrogen resides at interstitial lattice sites, statistically-stored dislocations (SSDs), and high-angle boundaries (HABs). SSDs are not the main trap site affecting HE behavior of the alloy. However, the HABs with the high desorption energy act as an almost irreversible trap site, which strongly absorbs hydrogen. It was firstly reported that the higher density of HABs as a strong trap site in a deformed 7xxx series aluminum alloy leads to decreasing the possibility of building up a critical hydrogen concentration required for crack initiation in a typical HAB, resulting in an excellent hydrogen embrittlement resistance.

UR - http://www.scopus.com/inward/record.url?scp=85098891393&partnerID=8YFLogxK

U2 - 10.1016/j.ijhydene.2020.12.028

DO - 10.1016/j.ijhydene.2020.12.028

M3 - Article

VL - 46.2021

SP - 8285

EP - 8299

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 11

ER -

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Unraveling the effect of dislocations and deformation-induced boundaries on environmental hydrogen embrittlement behavior of a cold-rolled Al–Zn–Mg–Cu alloy

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