| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1564852 | Journal of Nuclear Materials | 2016 | 5 Pages |
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.
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Authors
O.V. Emelyanova, M.G. Ganchenkova, E. Malitskii, Y.N. Yagodzinskyy, M. Klimenkov, V.A. Borodin, P.V. Vladimirov, R. Lindau, A. Möslang, H. Hänninen,