Microstructure and the fatigue crack propagation in the dissimilar low alloy/stainless steel GMAW welded joints
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F22%3A00561193" target="_blank" >RIV/68081723:_____/22:00561193 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S1044580322004016?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1044580322004016?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.matchar.2022.112119" target="_blank" >10.1016/j.matchar.2022.112119</a>
Alternative languages
Result language
angličtina
Original language name
Microstructure and the fatigue crack propagation in the dissimilar low alloy/stainless steel GMAW welded joints
Original language description
oining dissimilar metals is a frequent task for engineers in the power industry. The resulting dissimilar joints are then critical parts of the constructions and have to be able to withstand various loads during the operation of power devices. Due to the metals dissimilarity, the interface between ferritic side and the austenitic side of the joint is considered to be a critical area regarding the joint resistance to failure under static or cyclic loading. Proper understanding of the microstructures formed at the interface is key for production of solid and reliable dissimilar joints. In the present study, two dissimilar joints were prepared by gas metal arc welding (GMAW) using different low alloy steels. The microstructure of both joints is extensively studied using electron microscopy methods, with the emphasis taken on the interface between low alloy steel and austenitic weld metal. It was shown, that the interface between low alloy steel and weld metal is not a preferential crack path in case of non-environmental fatigue crack propagation, and the cracks are rather propagating through to the heat-affected zones of the low alloy steel side of the dissimilar joint. There were recorded significant differences in the threshold stress intensity factor between two tested welded joints (5.8 MPa × m1/2 vs. 8.7 MPa × m1/2. Therefore, the choice of the low alloy steel has a significant effect on the resistance to the fatigue crack propagation, and even small differences in the microstructure of low alloy steel may affect the resistance to the fatigue crack propagation at low stress ratios of the whole dissimilar joint.
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/GA22-28283S" target="_blank" >GA22-28283S: Oxide-induced crack closure and its implications for lifetime prediction of mechanical components (OXILAP)</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Materials Characterization
ISSN
1044-5803
e-ISSN
1873-4189
Volume of the periodical
191
Issue of the periodical within the volume
SEP
Country of publishing house
US - UNITED STATES
Number of pages
17
Pages from-to
112119
UT code for WoS article
000852984900001
EID of the result in the Scopus database
2-s2.0-85134779580