Název: Influence of ball material on the resulting fatigue life of thermal sprayed HVOF coatings in dynamic impact testing
Autoři: Duliškovič, J. ; Daniel, Josef ; Houdková, Š.
Typ dokumentu: Příspěvky z konference
Konference/Akce: METAL 2023. International Conference on Metallurgy and Materials /32./, Brno (CZ), 20230517
Rok: 2024
Jazyk: eng
Abstrakt: Dynamic impact wear, i.e. contact between two components in the presence of high cyclic local loads, is a challenging failure mode that occurs in many mechanical applications. Many previous studies have confirmed that dynamic impact testing is suitable for evaluating the contact fatigue of thermal sprayed coatings. However, the effect of the test parameters on the resulting lifetime is unclear. The aim of this study describes the effect of the ball material used in the dynamic impact test on the resulting fatigue life of the HVOF thermal sprayed coating. Three test balls made of WC/Co alloy, Si3N4 silicon nitride and 440 C steel were chosen for this study. Dynamic impaction testing was carried out on the Cr3C2-NiCr coating, which was sprayed by HVOF on a 1.2376 high-speed steel substrate. The impact lifetime was described by the number of critical impacts, i.e. the number of impacts before coating fatigue occurs. Furthermore, the depth and volume of impact craters were measured. Using scanning electron microscopy (SEM), the surface of the impacts as well as the microstructure of the coating on the cross-section in the region of the impacts were observed. Furthermore, the mechanism of crack propagation in the coating and the microstructure of the indentor were investigated.
Klíčová slova: Cr3C2-NiCr; dynamic impact test; fatigue; HVOF
Číslo projektu: TH75020003 (CEP)
Poskytovatel projektu: GA TA ČR
Zdrojový dokument: METAL 2023. 32nd International Conference on Metallurgy and Materials. Conference Proceedings, ISBN 978-80-88365-12-9, ISSN 2694-9296
Poznámka: Související webová stránka: https://www.confer.cz/metal/2023/4716-influence-of-ball-material-on-the-resulting-fatigue-life-of-thermal-sprayed-hvof-coatings-in-dynamic-impact-testing

Instituce: Ústav přístrojové techniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: https://hdl.handle.net/11104/0351060

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-541152


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav přístrojové techniky
Konferenční materiály > Příspěvky z konference