Structural Degradation of Steam Pipe Bend made of 0.5Cr-0.5MO-0.3V Steel after Long-term Creep Exposure

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F25870807%3A_____%2F15%3A%230000447" target="_blank" >RIV/25870807:_____/15:#0000447 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.metal2016.com/cz/sbornik-konference-metal-2015/" target="_blank" >http://www.metal2016.com/cz/sbornik-konference-metal-2015/</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Structural Degradation of Steam Pipe Bend made of 0.5Cr-0.5MO-0.3V Steel after Long-term Creep Exposure

Popis výsledku v původním jazyce

A creep damaged area was found during the routine control of the steam pipeline bend of 200 MW fossil-fuelled power plant boiler close to the outer fibre and near the top of the bend. The damaged area with identified creep cracks was about 250 x 600 mm in size and the maximum depth of the cracks was 7 mm. Metallographic analysis carried out in this area confirmed the non-homogeneous cavitation damage. Density of cavities continuously decreased throughout the affected area from the outer to the inner surface of the pipe, around the pipe circumference and also in the axial direction along the length of the bend. The actual extent of degradation of material properties was then evaluated by testing the mechanical properties, notch and fracture toughness and the results were used to calculate the residual life of the bend. The results of these analyses showed that although the creep damage extent was probably one of the worst, which had been ever detected in the boiler of this type, cracks

Název v anglickém jazyce

Structural Degradation of Steam Pipe Bend made of 0.5Cr-0.5MO-0.3V Steel after Long-term Creep Exposure

Popis výsledku anglicky

A creep damaged area was found during the routine control of the steam pipeline bend of 200 MW fossil-fuelled power plant boiler close to the outer fibre and near the top of the bend. The damaged area with identified creep cracks was about 250 x 600 mm in size and the maximum depth of the cracks was 7 mm. Metallographic analysis carried out in this area confirmed the non-homogeneous cavitation damage. Density of cavities continuously decreased throughout the affected area from the outer to the inner surface of the pipe, around the pipe circumference and also in the axial direction along the length of the bend. The actual extent of degradation of material properties was then evaluated by testing the mechanical properties, notch and fracture toughness and the results were used to calculate the residual life of the bend. The results of these analyses showed that although the creep damage extent was probably one of the worst, which had been ever detected in the boiler of this type, cracks

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

<a href="/cs/project/LO1203" target="_blank" >LO1203: Regionální materiálově technologické výzkumné centrum - Program udržitelnosti</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

24. ročník mezinárodní konference metalurgie a materiálů METAL 2015

ISBN

978-80-87294-58-1

ISSN

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e-ISSN

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Počet stran výsledku

7

Strana od-do

742-749

Název nakladatele

Tanger,s.r.o.

Místo vydání

Brno

Místo konání akce

Hotel Voroněž, Brno

Datum konání akce

3. 6. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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