| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7968550 | Journal of Nuclear Materials | 2014 | 6 Pages |
Abstract
Hydrogen effects on the mechanical tensile properties of the ferrite-martensite EUROFER 97 and ODS-EUROFER steels were studied after electrochemical hydrogen charging at room temperature. Hydrogen was introduced into the steels from 0.1Â N NaOH solution under controlled cathodic potential. Hydrogen TDS measurements show that yttria nanoparticles increase considerably the hydrogen uptake in ODS-EUROFER steel in comparison to that in EUROFER 97 steel. Hydrogen has only a minor effect on the yield stress and tensile strength of the studied steels. EUROFER 97 and ODS-EUROFER steels manifest rather different sensitivity to hydrogen embrittlement. It is shown that hydrogen reduces markedly elongation to fracture of ODS-EUROFER steel, if hydrogen concentration exceeds a certain critical value. FEG-SEM fractography observations evidence the intergranular fracture mode of ODS-EUROFER steel. The possible role of yttria nanoparticles in the hydrogen embrittlement mechanism is discussed.
Related Topics
Physical Sciences and Engineering
Energy
Nuclear Energy and Engineering
Authors
Y. Yagodzinskyy, E. Malitckii, M. Ganchenkova, S. Binyukova, O. Emelyanova, T. Saukkonen, H. Hänninen, R. Lindau, P. Vladimirov, A. Moeslang,