Influence of precipitation on dislocation substructure and creep properties of P91 steel weld joints

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47718684%3A_____%2F10%3A%230000435" target="_blank" >RIV/47718684:_____/10:#0000435 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Influence of precipitation on dislocation substructure and creep properties of P91 steel weld joints

Popis výsledku v původním jazyce

Two trial weld joints were prepared using the GTAW and SMAW method and they underwent creep testing at temperatures from 525°C to 625°C. The longest time to rupture was 45,811 hrs. Two main processes occurred during creep exposures: recovery and precipitation of secondary phases. A slight coarsening of M23C6 carbide, precipitation of Laves phase and Z-phase were observed after long tests at high temperatures. Some differences in microstructure and creep failure were found in individual zones of weldments. After long exposure at temperatures up to 600°C fractures occurred in the fine grain heat affected zone as a result of a low density of fine vanadium nitride and a high density of coarse particles at grain and subgrain boundaries. At 625°C growth of Laves phase caused a softening of the ferritic matrix and crack propagation in the weld metal.

Název v anglickém jazyce

Influence of precipitation on dislocation substructure and creep properties of P91 steel weld joints

Popis výsledku anglicky

Two trial weld joints were prepared using the GTAW and SMAW method and they underwent creep testing at temperatures from 525°C to 625°C. The longest time to rupture was 45,811 hrs. Two main processes occurred during creep exposures: recovery and precipitation of secondary phases. A slight coarsening of M23C6 carbide, precipitation of Laves phase and Z-phase were observed after long tests at high temperatures. Some differences in microstructure and creep failure were found in individual zones of weldments. After long exposure at temperatures up to 600°C fractures occurred in the fine grain heat affected zone as a result of a low density of fine vanadium nitride and a high density of coarse particles at grain and subgrain boundaries. At 625°C growth of Laves phase caused a softening of the ferritic matrix and crack propagation in the weld metal.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

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 periodika

Materials at High Temperatures

ISSN

0960-3409

e-ISSN

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Svazek periodika

27

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

6

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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