Microstructural changes in weld joint of COST F and FB2 steels after long term creep tests
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47718684%3A_____%2F17%3AN0000027" target="_blank" >RIV/47718684:_____/17:N0000027 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1080/09603409.2017.1380909" target="_blank" >https://doi.org/10.1080/09603409.2017.1380909</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1080/09603409.2017.1380909" target="_blank" >10.1080/09603409.2017.1380909</a>
Alternative languages
Result language
angličtina
Original language name
Microstructural changes in weld joint of COST F and FB2 steels after long term creep tests
Original language description
A trial weld joint of COST F and FB2 steels was produced using the GTAW HOT-WIRE method in conditions used in industry for welding steam turbine rotors. Long-term creep tests to the rupture of smooth cross-weld samples were carried out. Creep strength and hardness profiles across the weld joint were evaluated and correlated with the microstructure. Microstructures of ruptured samples were investigated using light, scanning and transmission electron microscopy and compared with virgin samples. Fracture occurred in COST F steel and its heat affected zone. Precipitation of Laves phase and structure recovery were the main reasons for the failure. Quantitative evaluation of M23C6 carbides and Laves phase particles in different parts of the weld joint was carried out. In the initial conditions, small Laves phase particles occurred only exceptionally in the weld metal. During creep at temperatures above 575 °C Laves phase precipitated in all parts of the weld joint and especially in the heat affected zones. Coarse Laves phase particles and their clusters with chromium carbides served as nucleation centres for cavities. As the fine grained heat affected zone of COST F steel was the softest part of the weld joint, many cavities originated and cracks were propagated.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
<a href="/en/project/TE01020118" target="_blank" >TE01020118: Electron microscopy</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2017
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
1878-6413
Volume of the periodical
34 (2017)
Issue of the periodical within the volume
5-6
Country of publishing house
GB - UNITED KINGDOM
Number of pages
8
Pages from-to
482-591
UT code for WoS article
000418753400021
EID of the result in the Scopus database
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