Combined microtomography, thermal desorption spectroscopy, X-ray diffraction study of hydrogen trapping behavior in 7XXX aluminum alloys

Md Shahnewaz Bhuiyan, Hiroyuki Toda, Zhang Peng, Su Hang, Keitaro Horikawa, Kentaro Uesugi, Akihisa Takeuchi, Nobuto Sakaguchi, Yoshio Watanabe

研究成果: ジャーナルへの寄稿学術誌査読

35 被引用数 (Scopus)

抄録

In the present study, combined thermal desorption spectroscopy (TDS), microtomography and X-ray diffraction study has been carried out to identify the hydrogen trap sites in 7XXX aluminum alloys. Through constant heating rate TDS experiments, three distinct trap states have been identified. It is revealed that micropores are the predominant hydrogen trap site in alloys with medium hydrogen content, whereas grain boundaries is the major hydrogen trap site in alloys with low and high hydrogen content. We have clarified that the rate of trap site occupancy in grain boundaries is high compared to dislocations and vacancies. Such high hydrogen coverage at grain boundaries indicates that the hydrogen-assisted fracture would be intergranular.

本文言語英語
ページ(範囲)221-228
ページ数8
ジャーナルMaterials Science and Engineering A
655
DOI
出版ステータス出版済み - 2月 8 2016

!!!All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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