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Evolution of a friction material with braking sequence: properties related to the microstructure

  • The microstructural complexity (multi-component and multi-scale) of friction materials, such as those used in braking applications,usually limits the characterization to the pristine state, even when they are to be submitted to high loading brake sequences. The understanding of properties ageing as a function of load history and microstructure is an important step to gain further knowledge on the tribological mechanisms occurring at the contact surface, as well as on the braking performances. To do so, the bulk mechanical and microscopical properties of a semi-metallic friction material are investigated before and after a braking sequence. Uniaxial compression tests combined with DIC are used to study the axial evolution of the mechanical behaviour (i.e., from the contact surface to the backplate). A significant mechanical evolution is observed in the after-braking material, which develops a layered behaviour along the depth. The layers (three) exhibit distinctThe microstructural complexity (multi-component and multi-scale) of friction materials, such as those used in braking applications,usually limits the characterization to the pristine state, even when they are to be submitted to high loading brake sequences. The understanding of properties ageing as a function of load history and microstructure is an important step to gain further knowledge on the tribological mechanisms occurring at the contact surface, as well as on the braking performances. To do so, the bulk mechanical and microscopical properties of a semi-metallic friction material are investigated before and after a braking sequence. Uniaxial compression tests combined with DIC are used to study the axial evolution of the mechanical behaviour (i.e., from the contact surface to the backplate). A significant mechanical evolution is observed in the after-braking material, which develops a layered behaviour along the depth. The layers (three) exhibit distinct mechanical/microstructural features that can be related to the braking thermal gradients and the occurrence of local damage.zeige mehrzeige weniger

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Metadaten
Autoren/innen:Itziar Serrano-Munoz
Koautoren/innen:J. Rapontchombo, V. Magnier, F. Brunel, S. Kossman, P. Dufrénoy
Dokumenttyp:Posterpräsentation
Veröffentlichungsform:Präsentation
Sprache:Englisch
Jahr der Erstveröffentlichung:2019
Organisationseinheit der BAM:8 Zerstörungsfreie Prüfung
8 Zerstörungsfreie Prüfung / 8.5 Mikro-ZfP
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten
Freie Schlagwörter:Bench braking sequence; Bulk properties ageing; DIC assisted compression; Load history; Semi-metallic friction material
Themenfelder/Aktivitätsfelder der BAM:Material
Material / Degradation von Werkstoffen und Materialien
Veranstaltung:22nd International Conference on Wear of Materials
Veranstaltungsort:Miami, Florida, USA
Beginndatum der Veranstaltung:14.04.2019
Enddatum der Veranstaltung:18.04.2019
Verfügbarkeit des Volltexts:Volltext-PDF im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:15.04.2019
Referierte Publikation:Nein