TY - JOUR
T1 - Influence of nanovoids in the hydrogen embrittlement fracture of Al–Zn–Mg–Cu alloys
AU - Shimizu, Kazuyuki
AU - Toda, Hiroyuki
AU - Kadogawa, Chihiro
AU - Fujihara, Hiro
AU - Takeuchi, Akihisa
N1 - Funding Information:
This research was supported by Japan Science and Technology Agency (JST) under Collaborative Research Based on Industrial Demand “Heterogeneous Structure Control: Towards Innovative Development of Metallic Structural Materials”, Grant Number JPMJSK1412 , Japan. This research was supported in part by a grant from the Light Metal Educational Foundation , Japan, and the Grant-in-aid for Scientific Research from JSPS, Subject No. 17H01328 , Japan.
Publisher Copyright:
© 2020
PY - 2020/6
Y1 - 2020/6
N2 - Al–Zn–Mg alloys are representative high-strength aluminum alloys, but hydrogen embrittlement hinders further strengthening. The role of nanovoids in the hydrogen embrittlement of a hydrogen-charged Al–Zn–Mg–Cu alloy is examined using high-resolution imaging-type synchrotron X-ray tomography. Although nanovoids are initiated during deformation, their growth and coalescence behaviors are limited. Hydrogen partitioning analysis indicates that this is because most of the formed vacancies are not stabilized because of the low hydrogen occupancy. Furthermore, 3D/4D clustering analyses of nanovoids reveal that they do not aggregate on a specific plane to initiate a crack, and that linkage between nanovoids is less likely to occur.
AB - Al–Zn–Mg alloys are representative high-strength aluminum alloys, but hydrogen embrittlement hinders further strengthening. The role of nanovoids in the hydrogen embrittlement of a hydrogen-charged Al–Zn–Mg–Cu alloy is examined using high-resolution imaging-type synchrotron X-ray tomography. Although nanovoids are initiated during deformation, their growth and coalescence behaviors are limited. Hydrogen partitioning analysis indicates that this is because most of the formed vacancies are not stabilized because of the low hydrogen occupancy. Furthermore, 3D/4D clustering analyses of nanovoids reveal that they do not aggregate on a specific plane to initiate a crack, and that linkage between nanovoids is less likely to occur.
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U2 - 10.1016/j.mtla.2020.100667
DO - 10.1016/j.mtla.2020.100667
M3 - Article
AN - SCOPUS:85084421130
VL - 11
JO - Materialia
JF - Materialia
SN - 2589-1529
M1 - 100667
ER -