Comparative Study of Hydrogen Uptake and
Diffusion in ODS Steels
Malitckii E.a, Yagodzinskyy Y.a, Ganchenkova M.a,b, Binyukova S.b, Hänninen, H.a,
Lindau R.c, Vladimirov P.c, Moeslang A.c
a School of Engineering, Aalto University,
Finland,
b National Research Nuclear University,
Moscow, Russian Federation,
c Karlsruhe Institute of Technology, Institute
for Applied Materials, Germany
In
this work EUROFER 97, ODS-EUROFER, and PM2000 steels are studied in terms of
their interaction with hydrogen at ambient temperature. Hydrogen uptake and
effective activation energy of its diffusion and trapping are calculated from
the thermal desorption spectra obtained for the studied steels in the
temperature interval up to 1123 K after the electrochemical hydrogen
charging. It was observed that hydrogen uptake in ODS-EUROFER and PM2000 is
markedly higher than in EUROFER 97 steel. It is shown that hydrogen in
ODS-EUROFER has the effective diffusion activation energy, which is 0.08 and
0.06 eV larger than that in EUROFER
97 and PM2000, respectively. The high-temperature components of the
TDS peaks in the studied ODS steels are suggested to reflect hydrogen
de-trapping from the oxide nanoparticles. The mean particle size, the size
distribution and chemical composition are studied using SEM and TEM techniques.