Different Types of Crackings of P91 Steel Weld Joints after Long-term Creep Tests

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47718684%3A_____%2F10%3A%230000427" target="_blank" >RIV/47718684:_____/10:#0000427 - 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
Different Types of Crackings of P91 Steel Weld Joints after Long-term Creep Tests
Original language description
The paper deals with creep testing and microstructural investigation of trial weld joints prepared of wrought and cast 9Cr-1Mo-V steels. Creep testing was carried out at temperature range from 525°C to 625°C, the longest time to rupture of 45,811 hrs wasachieved. Different types of cracking were observed in dependency on conditions of creep test and the type of weld joint. Type I and Type II fractures occurred at high applied stresses at relatively low temperatures in the tube weld joint and also in two specimens of the cast plate weld joint after creep test at the lowest temperature and the highest temperature. All other fractures were of the Type IV. Two processes occur simultaneously, which result in the creep dam-age: i) softening of solid solution as a result of Laves phase precipitation and ii) formation and coalescence of cavities in the soft fine grained parts of heat af-fected zone.
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
BALTICA VIII ? International Conference on Life Management and Maintenance for Power Plants
ISBN
978-951-38-7594-7
ISSN
0357-9387
e-ISSN
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Number of pages
16
Pages from-to
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Publisher name
VTT Technical Research Centre of Finland
Place of publication
Helsinky
Event location
Helsinky-Stockholm
Event date
Jan 1, 2010
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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