Hydrogen trapping in X70 structural pipeline steel and weldments

Jean Gabriel Sezgin, Hallvard G. Fjær, Hisao Matsunaga, Junichiro Yamabe, Vigdis Oldeng

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

抄録

Diffusion measurements and thermal desorption measurements have been performed on a X70 pipeline steel, in as received and normalized and quenched condition, after being hydrogen charged for 200 h at 100 MPa hydrogen gas pressure and 85℃. Numerical simulations based on the assumption of thermodynamic equilibrium were performed, aiming to compare the trapping energies when fitting to the TDS spectra. TDS experiments revealed a reversible trap site with activation energy of 26.2 kJ.mol-1. Irreversible trap sites with an activation energy of >100 kJ.mol-1 were observed from both as-received and heat-treated condition. In contrast, a reversible trap site with an activation energy of 49.2 kJ.mol-1 was observed only from the heat-treated condition. The numerical modelling based on the assumption of equilibrium between hydrogen in traps and hydrogen in lattice is seen to provide a good fit to the experimental data.

本文言語英語
ホスト出版物のタイトルProceedings of the 28th International Ocean and Polar Engineering Conference, ISOPE 2018
出版社International Society of Offshore and Polar Engineers
ページ228-235
ページ数8
ISBN(印刷版)9781880653876
出版ステータス出版済み - 2018
イベント28th International Ocean and Polar Engineering Conference, ISOPE 2018 - Sapporo, 日本
継続期間: 6月 10 20186月 15 2018

出版物シリーズ

名前Proceedings of the International Offshore and Polar Engineering Conference
2018-June
ISSN(印刷版)1098-6189
ISSN(電子版)1555-1792

その他

その他28th International Ocean and Polar Engineering Conference, ISOPE 2018
国/地域日本
CitySapporo
Period6/10/186/15/18

!!!All Science Journal Classification (ASJC) codes

  • エネルギー工学および電力技術
  • 海洋工学
  • 機械工学

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