Correlation of Microstructure Development of Cast CB2 Steel after Lomg-Term Creep Tests with Electrochemical Characteristics

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47718684%3A_____%2F12%3A%230000496" target="_blank" >RIV/47718684:_____/12:#0000496 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Correlation of Microstructure Development of Cast CB2 Steel after Lomg-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 programs. Creep testing was carried out at 650°C and a stress range from 50 MPa to 120 MPa. The longest time to rupture was 82,649 hours, however some tests are still running. Ruptured samples underwent fractographic and microstructural analyses and electrochemical measurements. Quantitative evaluation of substructure was performed using SEM and TEM of extraction carbon replicas and 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 with aim to test a possibility of access of material degradation using electrochemical measurement. Precipitation processes taking place during creep exposures resulted in changes of polarization curves. Extra peak of the current density was detected in the r

Název v anglickém jazyce

Correlation of Microstructure Development of Cast CB2 Steel after Lomg-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 programs. Creep testing was carried out at 650°C and a stress range from 50 MPa to 120 MPa. The longest time to rupture was 82,649 hours, however some tests are still running. Ruptured samples underwent fractographic and microstructural analyses and electrochemical measurements. Quantitative evaluation of substructure was performed using SEM and TEM of extraction carbon replicas and 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 with aim to test a possibility of access of material degradation using electrochemical measurement. Precipitation processes taking place during creep exposures resulted in changes of polarization curves. Extra peak of the current density was detected in the r

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

—

Projekt

—

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

2nd International Conference COMAT 2012

ISBN

978-80-87294-34-5

ISSN

—

e-ISSN

—

Počet stran výsledku

6

Strana od-do

6

Název nakladatele

Tanger Ltd.

Místo vydání

Ostrava

Místo konání akce

Plzeň

Datum konání akce

21. 11. 2012

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—