Investigation of microstructure changes in ODS-EUROFER after hydrogen loading

O. V. Emelyanova*, M. G. Ganchenkova, Evgenii Malitskii, Y. N. Yagodzinskyy, M. Klimenkov, V. A. Borodin, P. V. Vladimirov, R. Lindau, A. Möslang, Hannu Hänninen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)


The effect of hydrogen on the microstructure of mechanically tested ODS-EUROFER steel was investigated by means of transmission electron microscopy, thermal desorption spectroscopy, and atomistic simulations. The presence of yttrium oxide particles notably increases hydrogen uptake in ODS-EUROFER steel as compared to ODS-free EUROFER 97. Under tensile loading, hydrogen accumulation promotes the loss of cohesion at the oxide particle interfaces. First-principles molecular dynamics simulations indicate that hydrogen can be trapped at nanoparticle/matrix interface, creating OH-groups. The accumulation of hydrogen atoms at the oxide particle surface can be the reason for the observed hydrogen-induced oxide/matrix interface weakening and de-cohesion under the action of external tensile stress. (c) 2015 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)355-359
Number of pages5
JournalJournal of Nuclear Materials
Publication statusPublished - Jan 2016
MoE publication typeA1 Journal article-refereed


  • Hydrogen
  • ODS steel
  • Thermal desorption spectroscopy
  • Ab initio
  • Molecular dynamics


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