THE EFFECTS OF HIGH TEMPERATURE HELIUM GAS ON THE FRACTURE BEHAVIOUR OF ODS MA957

0473137 - ÚFM 2017 RIV CZ eng C - Conference Paper (international conference)
Rozumová, L. - Hojná, A. - Kalivodová, J. - Bublíková, P. - Hadraba, Hynek - Di Gabriele, F.
THE EFFECTS OF HIGH TEMPERATURE HELIUM GAS ON THE FRACTURE BEHAVIOUR OF ODS MA957.
METAL 2015: 24th International Conference on Metallurgy and Materials, Conference Proceedings. Ostrava: TANGER Ltd, 2015, s. 833-838. ISBN 978-80-87294-62-8.
[METAL 2015 - International Conference on Metallurgy and Materials /24./. Brno (CZ), 03.06.2016-05.06.2016]
R&D Projects: GA ČR(CZ) GA14-25246S
Institutional support: RVO:68081723
Keywords : ODS * MA957 * Helium
Subject RIV: JG - Metallurgy

Oxide-dispersion-strengthened steel (ODS) MA957 has been studied as a candidate material for Tritium Breeding Blanket for fusion reactors with helium coolant, where temperatures 250-650 degrees C are expected. Helium is one of type as primary coolant in High Temperature Reactor and Gas Cooled Fast Reactor with working temperature 500-1000 degrees C.

This work presents results of the study of behaviour of ODS (MA957) under influence of high temperature helium environment. Microstructure of the material and the interaction with He was investigated. The average exposure temperature was held at 720 degrees C. Subsequently, the surface changes were determined. Impact testing and material surfaces were studied in detail by means of SEM and TEM microscopy. It is essential to understand the He effect on microstructure and mechanical properties of structural materials since the He embrittlement in TBB may be significant.
Permanent Link: http://hdl.handle.net/11104/0270304