Defence of dissertation in the field of materials science and engineering, Evgenii Malitckii, MSc. (Tech.)
Hydrogen and helium effects on structural materials for Gen-IV nuclear reactors
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The public examination of the doctoral dissertation of Evgenii Malitckii, MSc (Tech.), will be held on 27 Nov 2015 at 10.00 at the Aalto University School of Engineering. Title of the dissertation is Hydrogen and helium effects on reduced activation Fe-Cr ferrite-martensite and ODS steels.
Hydrogen and helium effects on advanced structural materials for Gen IV nuclear reactor systems such as reduced activation ferrite-martensite (RAFM) and oxide dispersion strengthened (ODS) RAFM steels were studied. Hydrogen and helium stabilize the small vacancy clusters and facilitate the further formation of the voids that causes the swelling of the structural steels. At the same time, hydrogen plays an important role in degradation of the mechanical properties of the structural steels due to the hydrogen embrittlement.
Hydrogen and helium uptake and trapping were studied using thermal desorption analysis. The effect of hydrogen on tensile proper-ties of the RAFM and ODS-RAFM steels was studied at room and elevated temperatures using unique instrument for hydrogen charging from glow discharge plasma. The role of non-metallic inclusions in hydrogen embrittlement was studied and possible mechanisms of the hydrogen-induced fracture were discussed.
Opponent: Professor Il-Soon Hwang, Seoul National University, Republic of Korea
Supervisor: Professor Hannu Hänninen, Aalto University School of Engineering, Department of Engineering Design and Production
Electronic dissertation thesis: http://urn.fi/URN:ISBN:978-952-60-6540-3
Contact information:
Evgenii Malitckii, tel. +358 50 4002 906, evgeny.malitskiy@aalto.fi