Influence of nanovoids in the hydrogen embrittlement fracture of Al–Zn–Mg–Cu alloys

Kazuyuki Shimizu, Hiroyuki Toda, Chihiro Kadogawa, Hiro Fujihara, Akihisa Takeuchi

研究成果: Contribution to journalArticle査読

抄録

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.

本文言語英語
論文番号100667
ジャーナルMaterialia
11
DOI
出版ステータス出版済み - 6 2020

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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