Study of Creep Damage in P92 Steel Using Acoustic Emission

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60193247%3A_____%2F24%3AN0000001" target="_blank" >RIV/60193247:_____/24:N0000001 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2452321623007254" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2452321623007254</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.prostr.2023.12.027" target="_blank" >10.1016/j.prostr.2023.12.027</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Study of Creep Damage in P92 Steel Using Acoustic Emission

Popis výsledku v původním jazyce

For pipeline systems operating for a long time in thermal and/or power plants at high temperature and pressure, the degree of creep degradation is a key factor for their safe operation. The advanced 9% chromium creep-resistant P92 steel is now widely used in modern power plant boiler pipes operated at steam temperatures up to 650°C. In this work, the relationship between creep deformation and damage have been analysed. Constant load tensile creep tests were conducted at 600°C under different applied stresses. The microstructure evolution after creep loading was studied by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It was found that long-term creep exposition led to coarsening of the size of M23C6 carbides and their precipitation at the grain boundary, which promotes intergranular creep cavitation and thus reduces the creep lifetime of the steel. The acoustic emission (AE) method was applied to monitor the formation and the rate of propagation of cracks arising from creep damage. This nondestructive method is able to detect in advance the degradation processes leading to high temperature component failure. The necessity for nondestructive examination rather than destructive investigation to identify creep damage is emphasized.

Název v anglickém jazyce

Study of Creep Damage in P92 Steel Using Acoustic Emission

Popis výsledku anglicky

For pipeline systems operating for a long time in thermal and/or power plants at high temperature and pressure, the degree of creep degradation is a key factor for their safe operation. The advanced 9% chromium creep-resistant P92 steel is now widely used in modern power plant boiler pipes operated at steam temperatures up to 650°C. In this work, the relationship between creep deformation and damage have been analysed. Constant load tensile creep tests were conducted at 600°C under different applied stresses. The microstructure evolution after creep loading was studied by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It was found that long-term creep exposition led to coarsening of the size of M23C6 carbides and their precipitation at the grain boundary, which promotes intergranular creep cavitation and thus reduces the creep lifetime of the steel. The acoustic emission (AE) method was applied to monitor the formation and the rate of propagation of cracks arising from creep damage. This nondestructive method is able to detect in advance the degradation processes leading to high temperature component failure. The necessity for nondestructive examination rather than destructive investigation to identify creep damage is emphasized.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/TK03020089" target="_blank" >TK03020089: Diagnostika poškození potrubních systémů metodou akustické emise pro odhady jejich zbytkové životnosti</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název statě ve sborníku

Fracture, Damage and Structural Health Monitoring

ISBN

—

ISSN

2452-3216

e-ISSN

2452-3216

Počet stran výsledku

8

Strana od-do

259-266

Název nakladatele

Elsevier B.V.

Místo vydání

neuveden

Místo konání akce

London

Datum konání akce

12. 9. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—