The effect of sigma-phase formation on long-term durability of SUPER 304H steel

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F15%3A00233374" target="_blank" >RIV/68407700:21220/15:00233374 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
The effect of sigma-phase formation on long-term durability of SUPER 304H steel
Original language description
This work presents results of the analysis of phases formed in a SUPER 304H steel during a medium-term static isothermal ageing (675°C/15000 h). The investigations of the precipitates were especially focused on the occurrence of sigma-phase because its formation leads to the serious embrittlement. The evaluation and distribution of brittle sigma-phase were determined on macroscopic level by using light microscopy/colour etching. The microstructure was also investigated on microscopic level by scanning electron microscopes Tescan Lyra 3 and JEOL JSM 5410 equipped by electron backscatter diffraction unit and by transmission electron microscope Jeol 2100F. This work also investigates the effect of sigma-phase formation on the impact strength of an aged state of SUPER 304H steel. For comparison reasons the microstructure and the mechanical properties of the initial as-received) state were also investigated. It was found that the formation of brittle sigma-phase in the aged and therefore degraded microstructure led to the significant decrease of the impact strength. The influence of brittle sigma-phase on long-term durability of the degraded steel regarding its insufficient impact strength is discussed.
Czech name
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Czech description
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Project
<a href="/en/project/LO1207" target="_blank" >LO1207: Support of Sustainability of the Innovation Centre of Diagnostics and Applications of Materials at CTU-FME in Prague</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Metal 2015: 24th International conference on Metallurgy and materials
ISBN
978-80-87294-58-1
ISSN
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e-ISSN
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Number of pages
6
Pages from-to
1-6
Publisher name
Tanger
Place of publication
Ostrava
Event location
Brno
Event date
Jun 3, 2015
Type of event by nationality
EUR - Evropská akce
UT code for WoS article
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