Institute of Physics of Materials AS CR, v. v. i. > Projects > Effect of ultrafine particles dispersion on cleavage fracture of chromium steels

Effect of ultrafine particles dispersion on cleavage fracture of chromium steels

InvestigatorIng. Hynek Hadraba, Ph.D.
Number of ProjectGA106/08/1397
AgencyGrantová agentura České republiky
Duration2007-12-31 - 2010-12-30

Ferritic/martensitic steels of (9-12)Cr-X type and especially their oxide dispersion strengthened (ODS) versions became candidate structural material for reactor vessels of IV. generation fission reactors and intensively developed fusion reactors. In both cases the component service lifetime is determinated by synergy of a heat and radiation damage. While the radiation embrittlement of every candidate alloy is investigated, adequate attention is not paid to a quantitative characterization of microstructural changes and fracture behaviour of these materials connected with the thermal exposition. Precipitate originated during thermal ageing may in combination with dispersion of oxide particles lead to change of cleavage fracture mechanism and to critical embrittlement of steels. The project is aimed to quantification of these changes and finding of cleavage nucleation for microstructures with dispersion of oxide particles and precipitates. The solution of project will in first phase consist


Stratil L., Hadraba H., Buršík J., Dlouhý I.: Comparison of microstructural properties and Charpy impact behaviour between different plates of the Eurofer97 steel and effect of isothermal ageing. J. Nucl. Mater. 416 (2011) 311-317

Hadraba H., Kazimierzak B., Stratil L., Dlouhý I.: Microstructure and impact properties of ferritic ODS ODM401 (14%Cr-ODS of MA957 type). J. Nucl. Mater. 417 (2011) 241-244

Hadraba H., Fournier B., Stratil L., Malaplate J., Rouffie A., Wident P., Ziolek L., Béchadeb J.: Influence of microstructure on impact properties of 9-18%Cr ODS steels for fusion/fission applications. J. Nucl. Mater. 411 (2011) 112-118