The Effect of Sigma-Phase Formation on Long-Term Durability of SUPER 304H Steel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60193247%3A_____%2F15%3AUJP1686H" target="_blank" >RIV/60193247:_____/15:UJP1686H - isvavai.cz</a>

Výsledek na webu

<a href="http://www.metal2016.com/files/proceedings/21/papers/3662.pdf" target="_blank" >http://www.metal2016.com/files/proceedings/21/papers/3662.pdf</a>

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

The Effect of Sigma-Phase Formation on Long-Term Durability of SUPER 304H Steel

Popis výsledku v původním jazyce

"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."

Název v anglickém jazyce

The Effect of Sigma-Phase Formation on Long-Term Durability of SUPER 304H Steel

Popis výsledku anglicky

"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."

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

—

Projekt

<a href="/cs/project/TA01010181" target="_blank" >TA01010181: Technologie ohybů trubek pro přestupní plochy přehříváků a mezipřehříváků progresivních konstrukcí kotlů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

METAL 2015 Conference proceedings

ISBN

978-80-87294-62-8

ISSN

—

e-ISSN

—

Počet stran výsledku

6

Strana od-do

-1

Název nakladatele

TANGER Ltd.

Místo vydání

Ostrava

Místo konání akce

Brno, Czech Republic

Datum konání akce

3. 6. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—