The Role of Extrusions and Intrusions in the Initiation and Intergranular Growth of Fatigue Cracks
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F24%3A00585637" target="_blank" >RIV/68081723:_____/24:00585637 - isvavai.cz</a>
Result on the web
<a href="https://onlinelibrary.wiley.com/doi/10.1002/adem.202400313" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1002/adem.202400313</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/adem.202400313" target="_blank" >10.1002/adem.202400313</a>
Alternative languages
Result language
angličtina
Original language name
The Role of Extrusions and Intrusions in the Initiation and Intergranular Growth of Fatigue Cracks
Original language description
The role of extrusions and intrusions in the initiation and growth of intergranular fatigue cracks is studied by performing strain-controlled fatigue experiments on polycrystalline copper and by analyzing the development of intergranular crack initiation and resulting fracture surfaces. Fatigue cracks initiate either in the persistent slipbands within a grain or on the grain boundaries. The grain boundary initiation mechanism is due to the production of extrusions and intrusions on the grain boundaries that decrease the grain boundary cohesion forming submicroscopic crack nuclei. The alternating extrusions and intrusions are found also on the grain boundary facets of the fracture surface of a growing fatigue crack. Up to three slip systems are identified on the facets of cracked grain boundaries. Their form and height are found using scanning electron microscope observations and focused ion beam sectioning. A mechanism similar to intergranular grain boundary crack initiation is considered to explain the formation of grain boundary facets. A novel mechanism of intergranular fatigue crack growth is proposed based on the damaging effect of the extrusions and intrusions produced in the cyclic plastic zone of the growing fatigue crack.
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
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Advanced Engineering Materials
ISSN
1438-1656
e-ISSN
1527-2648
Volume of the periodical
26
Issue of the periodical within the volume
19
Country of publishing house
DE - GERMANY
Number of pages
9
Pages from-to
2400313
UT code for WoS article
001206425000001
EID of the result in the Scopus database
2-s2.0-85191059536