High temperature service embrittlement of EUROFER´97 steel

0354284 - ÚFM 2011 RIV SK eng J - Článek v odborném periodiku
Stratil, Luděk - Hadraba, Hynek - Dlouhý, Ivo
High temperature service embrittlement of EUROFER´97 steel.
Acta Metallurgica Slovaca. Roč. 1, č. 2 (2010), s. 142-145. ISSN 1335-1532.
[Fraktografia 2009. Stará Lesná, 08.11.2009-11.11.2009]
Grant CEP: GA ČR GA106/08/1397; GA AV ČR 1QS200410502
Výzkumný záměr: CEZ:AV0Z20410507
Klíčová slova: Eurofer´97 * isothermal ageing * embrittlement * impact properties
Kód oboru RIV: JL - Únava materiálu a lomová mechanika

The aim of the work was to describe effect of long-time ageing on the microstructure and fracture properties of the Eurofer´97 steel. The embrittlement of the high chromium ferritic-martensitic implies important limitation for use of these steels causing carbide coarsening and/or intercrystalline embrittlement. Detailed microstructure studies were carried out on the steel in as-received state and in state after long-time thermal ageing for 550°C/5.000 h. Mechanical properties were evaluated by means of Charpy impact testing. Only a slight growth of the particles and partial recrystalization of the subgrains after thermal ageing has been observed. The isothermal ageing caused shift in tDBTT about +5°C Degradation of the impact properties was probably caused by synergic effect of carbide coarsening and mind recrystalization of the subgrains
Trvalý link: http://hdl.handle.net/11104/0193324