Effect of PWHT of X6Cr-NiNbN 25-20 Steel on the Evolution of the Sigma Phase during Creep Exposure at 700 °C

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F23%3AN0000224" target="_blank" >RIV/26722445:_____/23:N0000224 - isvavai.cz</a>
Result on the web
<a href="https://journalmt.com/artkey/mft-202306-0010_effect-of-pwht-of-x6cr-ninbn-25-20-steel-on-the-evolution-of-the-sigma-phase-during-creep-exposure-at-700-c.php" target="_blank" >https://journalmt.com/artkey/mft-202306-0010_effect-of-pwht-of-x6cr-ninbn-25-20-steel-on-the-evolution-of-the-sigma-phase-during-creep-exposure-at-700-c.php</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.21062/mft.2023.091" target="_blank" >10.21062/mft.2023.091</a>

Result language
angličtina
Original language name
Effect of PWHT of X6Cr-NiNbN 25-20 Steel on the Evolution of the Sigma Phase during Creep Exposure at 700 °C
Original language description
Superheaters and reheaters made of heat-resistant austenitic steels are being replaced in existing fossil fuel power plants to operate at Advanced Ultra Super Critical (A-USC) parameters of steam. Newly developed and used high nickel content austenitic steels, such as in X6Cr NiNbN 25-20, are predicted to significantly suppress the precipitation of a hazardous s-phase during long-term creep exposure. The sphase causes premature failure of the component during creep, which is usually supported by a local change in hardness in the case of welded assemblies. Experimental results show that PWHT significantly improved reduction of area. However, for the PWHT specimen with a shorter exposure time of 15,712 hours, there was an acceleration in the precipitation of sigma-phase particles during creep at 700 degrees C compared to the specimen in the AW state, after 20,557 hours.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20501 - Materials engineering

Project
<a href="/en/project/TK03020055" target="_blank" >TK03020055: Research of creep behavior and verification of brittle-fracture properties of austenitic steels for blocks of thermal power plants with USC steam parameters.</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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