Investigation of microstructure changes in ODS-EUROFER after hydrogen loading

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • National Research Nuclear University
  • Karlsruhe Institute of Technology
  • Russian Research Centre Kurchatov Institute

Abstract

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.

Details

Original languageEnglish
Pages (from-to)355-359
Number of pages5
JournalJournal of Nuclear Materials
Volume468
Publication statusPublished - Jan 2016
MoE publication typeA1 Journal article-refereed

    Research areas

  • Hydrogen, ODS steel, Thermal desorption spectroscopy, HRTEM, Ab initio, Molecular dynamics, STEELS, IRRADIATION, HELIUM

ID: 1515831