Correlation of CB2 steel microstructure before and after long-term creep tests with electrochemical characteristics

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

Correlation of CB2 steel microstructure before and after long-term creep tests with electrochemical characteristics

Popis výsledku v původním jazyce

Specimens for long-term creep tests were taken from two different positions in the pilot valve made of cast CB2 steel, which was developed within the COST programmes. Creep testing was carried out at 650°C and a stress range from 50 MPa to 120 MPa. Sometests are still running. Ruptured samples underwent fractographic and microstructural analyses and electrochemical measurements. Quantitative evaluation was performed using extraction carbon replicas and substructure was observed using TEM of thin foils.Microstructure of the virgin material and crept specimens were compared and correlated with electrochemical characteristics measured on the base of the potentiokinetic polarization curves. Precipitation processes taking place during creep exposures resulted in changes of polarization curves. Secondary peak of the current density was detected at a specific potential applied on specimens after creep tests at 650°C. This peak increased with increasing time to rupture and is related to prec

Název v anglickém jazyce

Correlation of CB2 steel microstructure before and after long-term creep tests with electrochemical characteristics

Popis výsledku anglicky

Specimens for long-term creep tests were taken from two different positions in the pilot valve made of cast CB2 steel, which was developed within the COST programmes. Creep testing was carried out at 650°C and a stress range from 50 MPa to 120 MPa. Sometests are still running. Ruptured samples underwent fractographic and microstructural analyses and electrochemical measurements. Quantitative evaluation was performed using extraction carbon replicas and substructure was observed using TEM of thin foils.Microstructure of the virgin material and crept specimens were compared and correlated with electrochemical characteristics measured on the base of the potentiokinetic polarization curves. Precipitation processes taking place during creep exposures resulted in changes of polarization curves. Secondary peak of the current density was detected at a specific potential applied on specimens after creep tests at 650°C. This peak increased with increasing time to rupture and is related to prec

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proc. of the 12th International conference on Creep and Fracture of Engineering Materials and Structures

ISBN

978-4-88903-407-3

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

4

Název nakladatele

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Místo vydání

Kyoto, Japan

Místo konání akce

Kyoto, Japan

Datum konání akce

27. 5. 2012

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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