Original title: Microstructure and impact response of high-chromium ODS steels
Authors: Hadraba, Hynek ; Fournier, B. ; Stratil, Luděk ; Dlouhý, Ivo
Document type: Papers
Conference/Event: New Methods of Damage and Failure Analysis of Structural Parts, Ostrava (CZ), 2010-09-06 / 2010-09-10
Year: 2010
Language: eng
Abstract: A new class of ODS steels alloyed by Cr and W is developed as a high temperature structural material for prospective power sources, the fission reactors of IV generation and the fusion reactors. The aim of the work was to investigate the influence of microstructure on the fracture properties of ODS (9-18)Cr-W-Ti-Y2O3 steels. It was found that the increasing in the Cr and W content brought to the steels strength at elevated temperatures and increased upper shelf energy level and shifted transition region towards lower temperatures. The increase in the yttria content led to the decreasing the upper shelf energy and shifted the TDBTT towards higher temperatures. The impact energy of rolled ODS sheet depended strongly on the fracture plane orientation regarding to the rolling direction. The splitting edges profile changed according to the sample orientation and thus the energy portion consumed for the shearing was changed.
Keywords: brittleness; fracture; thermal ageing
Project no.: CEZ:AV0Z20410507 (CEP), GA106/08/1397 (CEP)
Funding provider: GA ČR
Host item entry: New Methods of Damage and Failure Analysis of Structural Parts, ISBN 978-80-248-2265-5

Institution: Institute of Physics of Materials AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0192578

Permalink: http://www.nusl.cz/ntk/nusl-42313


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Research > Institutes ASCR > Institute of Physics of Materials
Conference materials > Papers