Investigation of microstructure changes in ODS-EUROFER after hydrogen loading

JOURNAL OF NUCLEAR MATERIALS

卷:468

Article

Emelyanova, O. V.¹  Ganchenkova, M. G.^1,2  Malitskii, E.²  Yagodzinskyy, Y. N.²  Klimenkov, M.³  Borodin, V. A.^1,4  Vladimirov, P. V.³  Lindau, R.³  Moeslang, A.³  Hanninen, H.² 

[1] Natl Res Nucl Univ, MEPhI Moscow Engn Phys Inst, Moscow 115409, Russia

[2] Aalto Univ, Sch Engn, FI-00076 Aalto, Finland

[3] Karlsruhe Inst Technol, Inst Appl Mat Appl Mat Phys, D-76344 Eggenstein Leopoldshafen, Germany

[4] Kurchatov Inst, Natl Res Ctr, Moscow 123182, Russia

关键词: Hydrogen;    ODS steel;    Thermal desorption spectroscopy;    HRTEM;    Ab initio;    Molecular dynamics;   

DOI  :  10.1016/j.jnucmat.2015.07.053

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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