Material Degradation of Steam Pipe Elbow after Long-term Exposure
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F25870807%3A_____%2F15%3A%230000383" target="_blank" >RIV/25870807:_____/15:#0000383 - isvavai.cz</a>
Result on the web
<a href="http://www.scientific.net" target="_blank" >http://www.scientific.net</a>
DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Material Degradation of Steam Pipe Elbow after Long-term Exposure
Original language description
Routine non-destructive examination of the steam pipe elbow after more than 240 000 hours of operation at elevated temperature revealed the extensive creep damage on the outer surface of the pipe elbow. Complex metallographic analysis made in this area confirmed creep damage as well as the non-uniform nature of the cavitation. The density of cavities continuously decreased from the outer pipe surface towards the inner surface, but also its density rapidly waned beyond the damaged area in both directions, along the circumference as well as the length of the elbow. The actual extent of the material degradation was then evaluated by testing of mechanical properties, Charpy-V and fracture toughness testing and the results were used in calculation of the residual life of the pipe elbow. It was shown that although the creep damage was perhaps one of the worst detected in Czech Republic, the cracks in the pipe elbow would spread by the stable growth until the half of the pipe wall thickness.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JG - Metallurgy, metal materials
OECD FORD branch
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Result continuities
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)
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Key Engineering Materials
ISSN
1662-9795
e-ISSN
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Volume of the periodical
647
Issue of the periodical within the volume
XIII
Country of publishing house
CH - SWITZERLAND
Number of pages
8
Pages from-to
162-169
UT code for WoS article
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EID of the result in the Scopus database
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