Microstructural changes in creep exposed P91 steel weld joint.
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47718684%3A_____%2F11%3A%230000448" target="_blank" >RIV/47718684:_____/11:#0000448 - isvavai.cz</a>
Result on the web
<a href="http://vzuplzen.cz" target="_blank" >http://vzuplzen.cz</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3184/096034011X13061610296777" target="_blank" >10.3184/096034011X13061610296777</a>
Alternative languages
Result language
angličtina
Original language name
Microstructural changes in creep exposed P91 steel weld joint.
Original language description
Cast plates made of 9Cr ? 1MoV creep resistant steel were joined together using the GTAW and SMAW methods. Creep testing was carried out at a temperature range from 525_C to 625_C and a stress range from 50 to 240MPa. The microstructure of crept specimens was compared with weld joint at conditions after PWHT and the base material before welding. Substructures were investigated in the base material, the heat affected zones and the weld metal. Different kinetics of precipitation reactions in individual zones caused changes in creep strength and unexpected transition from Type IV cracking to Type I cracking at long creep exposure at 625_C. After creep tests at temperatures above 550_C for about 30,000 hours, coarse particles of Laves phase were observed.In addition, small plates of Z-phase were detected after creep tests at 625_C. Precipitation of Laves phase occurred in the weld metal predominately and caused depletion of solid solution about molybdenum. If the lowest stress were applie
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/FR-TI2%2F080" target="_blank" >FR-TI2/080: New Technologies of Joining of Flow Turbine Components for Ultra Super Critical Parameters of Steam</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Materials at high temperatures
ISSN
0960-3409
e-ISSN
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Volume of the periodical
28
Issue of the periodical within the volume
2
Country of publishing house
GB - UNITED KINGDOM
Number of pages
10
Pages from-to
137-146
UT code for WoS article
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EID of the result in the Scopus database
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