<div class="csl-bib-body">
<div class="csl-entry">Zauner, L., Hahn, R., Hunold, O., Polcik, P., & Riedl-Tragenreif, H. (2022, May 31). <i>Durability of hard protective coatings: Insights on fracture and fatigue mechanisms</i> [Poster Presentation]. 20. Plansee Seminar 2022, Reutte, Austria. http://hdl.handle.net/20.500.12708/152844</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/152844
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dc.description.abstract
Tailoring the intrinsic fracture characteristics of hard protective coatings towards fatigue properties of state-of-the-art bulk materials is paramount for the application of innovative coating materials extending the fatigue-life of high-performance components. Thus, an in-depth knowledge on the failure pathways of ceramic-based thin films – typically lacking in intrinsic ductility – but also coated components under cyclic loading is imperative to extend their lifetime. Here, we present a novel approach using quasi-static and cyclic bending of pre-notched, unstrained micro-cantilever beams in conjunction with in-situ synchrotron X-ray diffraction to reveal the intrinsic fracture toughness (KIC) and critical failure aspects of thin films under various loading conditions. Up to the high-cycle fatigue regime (i.e., N = 107 cycles), the failure of monolithic coatings is shown to be dominated by the inherent fracture resistance, irrespective of the bonding character. The observed fracture behaviour is further correlated with large-scale dynamic-mechanical analysis of coated Ti6Al4V platelets to include residual stress states and the coating-substrate interface. The results are expected to provide key-insights into the underlying mechanisms promoting crack growth in PVD coated specimens.
en
dc.description.sponsorship
CDG Christian Doppler Forschungsgesellschaft
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dc.language.iso
en
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dc.subject
Fatigue
en
dc.subject
Micromechanical testing
en
dc.subject
Fracture toughness
en
dc.subject
HCF
en
dc.subject
LCF
en
dc.title
Durability of hard protective coatings: Insights on fracture and fatigue mechanisms
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.contributor.affiliation
Oerlikon (Liechtenstein), Liechtenstein
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dc.contributor.affiliation
Plansee (Germany), Germany
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dc.relation.grantno
CDL-SEC
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dc.type.category
Poster Presentation
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tuw.project.title
Oberflächentechnik von hochbeanspruchten Präzisionskomponenten
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tuw.researchinfrastructure
Röntgenzentrum
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tuw.researchinfrastructure
Universitäre Service-Einrichtung für Transmissionselektronenmikroskopie
