Influences of hydrogen on deformation and fracture behaviors of high Zn 7XXX aluminum alloys

Md Shahnewaz Bhuiyan, Yuki Tada, Hiroyuki Toda, Su Hang, Kentaro Uesugi, Akihisa Takeuchi, Nobuto Sakaguchi, Yoshio Watanabe

研究成果: Contribution to journalArticle査読

17 被引用数 (Scopus)

抄録

Hydrogen degrades the mechanical properties of high strength 7XXX aluminum alloys in two ways: (i) degrades the mechanical properties by hydrogen embrittlement, and (ii) partitioned into micropores as molecular hydrogen and make contributions to ordinary ductile fracture. The multifaceted effects of hydrogen on the mechanical properties of high Zn content 7XXX aluminum alloys during deformation and fracture is studied by using synchrotron X-ray microtomography. Our results have revealed that the hydrogen susceptibility has increased with increasing the Zn amount. High concentration of hydrogen was induced by the EDM wire eroder. This high concentrated hydrogen induces quasi-cleavage fracture and restricts the growth of micropores during ductile deformation. The threshold concentration of hydrogen ahead of the crack tip for the nucleation of quasi-cleavage feature was estimated to be 13cm3/100g Al.

本文言語英語
ページ(範囲)13-29
ページ数17
ジャーナルInternational Journal of Fracture
200
1-2
DOI
出版ステータス出版済み - 7 1 2016

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Modelling and Simulation
  • Mechanics of Materials

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