Embrittlement of ferritic 14%Cr ODS steel in air and in Pb/Pb-Bi coolants at elevated temperatures

0385472 - ÚFM 2013 RIV CZ eng C - Conference Paper (international conference)
Hadraba, Hynek - Dlouhý, Ivo - Hojná, A. - Di Gabriele, F.
Embrittlement of ferritic 14%Cr ODS steel in air and in Pb/Pb-Bi coolants at elevated temperatures.
New Methods of Damage and Failure Analysis of Structural Parts. Ostrava: VŠB-TU Ostrava, 2012, s. 437-442. ISBN 978-80-248-2802-2.
[New Methods of Damage and Failure Analysis of Structural Parts. Ostrava (CZ), 10.09.2012-14.09.2012]
R&D Projects: GA ČR(CZ) GAP108/10/0466
Institutional support: RVO:68081723
Keywords : oxide dispersion strengthened * impact behaviour * KLST * carbide coarsening
Subject RIV: JG - Metallurgy

The work was focused to describing influence of long-time high-temperature exposition of the ferritic 14%Cr ODS steel to the liquid Pb and Pb-Bi metals environments. The steel was during exposition in the liquid Pb and Pb-Bi at 600°C and 550°C respectively depleted from Cr and Ti formed with Pb and Bi the surface oxide scale. In addition the isothermal ageing of the steel at 650°C caused precipitates coarsening and porosity development by dislocation annealing in the bulk of the steel. Tensile and impact bend tests reveals outstanding embrittlement of the isothermally aged ODS steel and the steel after exposition to the liquid Pb and Pb-Bi compared with the steel in as-received state.
Permanent Link: http://hdl.handle.net/11104/0215269