Investigation of microstructure changes in ODS-EUROFER after hydrogen loading

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• 作者：O.V. Emelyanova^a ; ^{eolga@bk.ru" class="auth_mail" title="E-mail the corresponding author} ; M.G. Ganchenkova^a ; ^b ; E. Malitskii^b ; Y.N. Yagodzinskyy^b ; M. Klimenkov^c ; V.A. Borodin^a ; ^d ; P.V. Vladimirov^c ; R. Lindau^c ; A. Mö ; slang^c ; H. Hä ; nninen^b
• 关键词：Hydrogen ; ODS steel ; Thermal desorption spectroscopy ; HRTEM ; Ab initio ; Molecular dynamics
• 刊名：Journal of Nuclear Materials
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：468
• 期：Complete
• 页码：355-359
• 全文大小：1864 K

文摘

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.