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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Thermal ageing of Eurofer´97 steel
 Hadraba, Hynek ; Dlouhý, Ivo
Ferritic-martensitic reduced activation steel Eurofer´97 of 9Cr-1W(V-Ta) type is leading candidate for structural material for in-vessel and first wall components (outboard blanket) of proposed fusion reactors. The utilization of the Eurofer´97 steels is limited up to a temperature about 550°C. On the other hand the efficiency enhancement of the proposed fusion reactors to the level suitable for energy production is predetermined by increase of temperature in fusion tokamak reactor. The long term exploitation of the steel at high temperatures leads to extensive microstructural changes. The aim of the work is to investigate the influence of long term thermal ageing on fracture properties of Eurofer´97 steel. High thermal ageing of the steel was simulated by step cooling treatment. Charpy impact tests were performed before and after thermal ageing. No evident changes in impact properties have been registered when comparing the properties of the steel in as-received and in step-cooled state.
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