CORRELATION OF CREEP PROPERTIES OF SIMULATED AND REAL WELD JOINTS IN MODIFIED 9 %Cr STEELS

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27230%2F10%3A10225090" target="_blank" >RIV/61989100:27230/10:10225090 - 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
CORRELATION OF CREEP PROPERTIES OF SIMULATED AND REAL WELD JOINTS IN MODIFIED 9 %Cr STEELS
Original language description
The aim of the investigation performed is to why creep rupture on welded joints at high temperatures is often observed in the heat-affected zone (HAZ), especially in the so-called inter-critical zone (IC-HAZ). The creep rupture strength (CRS) of cross-weld joints is usually about 20 to 30 % lower than that of the base material, in the case of creep-resistant modified chromium steels. With increasing IPS of secondary phases, the proof stress and creep rupture strength decreases, while creep rate increases. The Smitweld machine was used to reproduce the thermal cycles in the HAZ. The microstructure of the HAZ-simulated regions was analysed by transmission electron microscopy. Real creep tests were carried out on specimens with HAZ-simulated regions and also on the P91 real welded joints. It was found that inter-particle spacing of secondary phases in the inter-critical region of the HAZ is much higher than that of the base material.
Czech name
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Czech description
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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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Publication year
2010
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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