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

Result code in 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>
Result on the web
<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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Result language
angličtina
Original language name
Structural Degradation of Steam Pipe Bend made of 0.5Cr-0.5MO-0.3V Steel after Long-term Creep Exposure
Original language description
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
Czech name
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Czech description
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Project
<a href="/en/project/LO1203" target="_blank" >LO1203: Regional Materials Science and Technology Centre - Feasibility Program</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
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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Number of pages
7
Pages from-to
742-749
Publisher name
Tanger,s.r.o.
Place of publication
Brno
Event location
Hotel Voroněž, Brno
Event date
Jun 3, 2015
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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