Microstructure analysisof E911 steel after more then 100,000 hours of creep exposure

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47718684%3A_____%2F10%3A%230000434" target="_blank" >RIV/47718684:_____/10:#0000434 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Microstructure analysisof E911 steel after more then 100,000 hours of creep exposure
Original language description
The material of trial rotor made of E911 steel underwent creep testing at temperatures from 500 °C to 600 °C. Three specimens crept at different conditions were selected for TEM investigation. Quantitative analyses of substructure and particles of secondary phases were performed. Microstructure corresponded to tempered martensite with ferritic laths subdivided into subgrains. Coarse M23C6 carbides occurred at grain and subgrain boundaries and fine vanadium nitride was present within grains. Recovery taking place during creep test at 500°C/250MPa/107,514 hrs resulted in decrease in dislocation density and increase in size of subgrains. Size of coarse carbides slightly increased. Important changes occurred after test at 575°C/155MPa/34,707hrs. Laves phase precipitated, mean size of coarse particles remarkable increased, dislocation density decreased while size of subgrains remained almost the same in comparison to the substructure after creep test at 500°C/335MPa/587hrs.
Czech name
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Czech description
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Publication year
2010
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Proc. of the 9th Liege conference Materials for advanced power engineering 2010
ISBN
978-3-89336-685-9
ISSN
1866-1793
e-ISSN
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Number of pages
10
Pages from-to
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Publisher name
Forschung Zentrum Julich GmbH
Place of publication
Liege
Event location
Liege
Event date
Jan 1, 2010
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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