Microstructure analysisof E911 steel after more then 100,000 hours of creep exposure

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Microstructure analysisof E911 steel after more then 100,000 hours of creep exposure

Popis výsledku v původním jazyce

The material of trial rotor made of E911 steel underwent creep testing at temperatures from 500 °C to 600 °C. Three specimens crept at different conditions were selected for TEM investigation. Quantitative analyses of substructure and particles of secondary phases were performed. Microstructure corresponded to tempered martensite with ferritic laths subdivided into subgrains. Coarse M23C6 carbides occurred at grain and subgrain boundaries and fine vanadium nitride was present within grains. Recovery taking place during creep test at 500°C/250MPa/107,514 hrs resulted in decrease in dislocation density and increase in size of subgrains. Size of coarse carbides slightly increased. Important changes occurred after test at 575°C/155MPa/34,707hrs. Laves phase precipitated, mean size of coarse particles remarkable increased, dislocation density decreased while size of subgrains remained almost the same in comparison to the substructure after creep test at 500°C/335MPa/587hrs.

Název v anglickém jazyce

Microstructure analysisof E911 steel after more then 100,000 hours of creep exposure

Popis výsledku anglicky

The material of trial rotor made of E911 steel underwent creep testing at temperatures from 500 °C to 600 °C. Three specimens crept at different conditions were selected for TEM investigation. Quantitative analyses of substructure and particles of secondary phases were performed. Microstructure corresponded to tempered martensite with ferritic laths subdivided into subgrains. Coarse M23C6 carbides occurred at grain and subgrain boundaries and fine vanadium nitride was present within grains. Recovery taking place during creep test at 500°C/250MPa/107,514 hrs resulted in decrease in dislocation density and increase in size of subgrains. Size of coarse carbides slightly increased. Important changes occurred after test at 575°C/155MPa/34,707hrs. Laves phase precipitated, mean size of coarse particles remarkable increased, dislocation density decreased while size of subgrains remained almost the same in comparison to the substructure after creep test at 500°C/335MPa/587hrs.

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proc. of the 9th Liege conference Materials for advanced power engineering 2010

ISBN

978-3-89336-685-9

ISSN

1866-1793

e-ISSN

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Počet stran výsledku

10

Strana od-do

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Název nakladatele

Forschung Zentrum Julich GmbH

Místo vydání

Liege

Místo konání akce

Liege

Datum konání akce

1. 1. 2010

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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