Very high frequency induced fatigue damage
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F24%3A00588417" target="_blank" >RIV/68081723:_____/24:00588417 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0167844224003409?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0167844224003409?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.tafmec.2024.104590" target="_blank" >10.1016/j.tafmec.2024.104590</a>
Alternative languages
Result language
angličtina
Original language name
Very high frequency induced fatigue damage
Original language description
Fatigue lifetime and fatigue endurance limit are enhanced by the increased strain rate for many materials. Consequently, ultrasonic fatigue testing yields an S-N curve well above the conventionally obtained ones for the strain rate sensitive materials. Thus, understanding of the fatigue damage mechanisms operating under very high frequencies and their relation to the conventional testing results is crucial for lifetime prediction in the very high cycle fatigue region. he increase in test frequency from 20 Hz to 20 kHz enhances the fatigue life and the fatigue endurance limit of the ferritic-pearlitic structure steel. On the other hand, the character of the created surface relief was similar for all the test conditions in terms of test frequency and stress amplitude applied. The increased testing frequency reduced the number of slip markings. Nevertheless, it seems that test frequency only slightly impacted the height/depth of the extrusions/intrusions. Focused ion beam tomography and 3D reconstruction of the volume below the slip markings demonstrated the cavity distribution within the material volume and along the slip plane. No slip markings were observed in the pearlite areas. Fatigue crack initiation occurred predominantly in the slip markings, however, subsurface cavity-assisted crack initiation was occasionally observed, too. Coalescence of cavities along the slip plane facilitated the fatigue crack initiation and early growth. No difference in damage mechanism was detected regardless of the test frequency or stress amplitude.
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/EH22_008%2F0004634" target="_blank" >EH22_008/0004634: Mechanical engineering of biological and bio-inspired systems</a><br>
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
Theoretical and Applied Fracture Mechanics
ISSN
0167-8442
e-ISSN
1872-7638
Volume of the periodical
133
Issue of the periodical within the volume
OCT
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
8
Pages from-to
104590
UT code for WoS article
001282468600001
EID of the result in the Scopus database
2-s2.0-85199575214