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

Result code in 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>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Correlation of Microstructure Development of Cast CB2 Steel after Lomg-Term Creep Tests with Electrochemical Characteristics
Original language description
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
Czech name
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Czech description
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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