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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/TK03020055" target="_blank" >TK03020055: Výzkum creepového chování a ověřování křehko-lomových vlastností austenitických ocelí pro bloky tepelných elektráren s USC parametry páry.</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Manufacturing technology

ISSN

1213-2489

e-ISSN

2787-9402

Svazek periodika

23

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

7

Strana od-do

893-899

Kód UT WoS článku

001152480900016

EID výsledku v databázi Scopus

2-s2.0-85184139857