TY - CONF A1 - Kloß, Heinz A1 - Österle, Werner A1 - Dmitriev, A.I. ED - Bartz, Wilfried J. T1 - Modelling mechanical friction and wear behaviour using numerical results of the movable cellular automata (MCA) method T2 - 19th International colloquium tribology - Industrial and automotive lubrication N2 - In the mechanical friction and wear process, normal and tangential (shear) forces cause elastic and plastic deformations, generate cracks and form loose wear particles through fracture processes. Depending on the working conditions, the material properties and the real contact Situation (topography), a third body is formed as a mechanical ly mixed layer, which determines different running-in and steady-state behaviours. Two dimensional (2D) MCA Simulation results will be described via empirical equations, which are related to the incubation time (period without wear) and the following running-in wear rate (kinetic concept of strength, fatigue wear model). In order to understand the running-in and steady-state wear, kinetic model equations for mass balance of the third body are useful and are therefore to be included in the investigation. For a more complex material behaviour, numerical Simulation results are also presented for friction at the pad-disk interface of automotive brakes. T2 - 19th International colloquium Tribology - Industrial and automotive lubrication CY - Stuttgart/Ostfildern, Germany DA - 21.01.2014 PY - 2014 SN - 978-3-943563-10-8 SP - Paper 8.10, 1 EP - 7 CY - Stuttgart/Ostfildern AN - OPUS4-30437 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Jiao, Feng A1 - Österle, Werner A1 - Portella, Pedro Dolabella A1 - Ziebs, Josef T1 - Cyclic hardening of alloy 800h under biaxial loading T2 - Stainless steels '96 T2 - International Congress Stainless Steels '96 ; 2nd European congress CY - Düsseldorf and Neuss, Germany DA - 1996-06-03 KW - Hochtemperaturtechnik KW - Beanspruchung, zyklisch KW - Stahl, austenitisch KW - Legierung 800 H PY - 1996 SN - 3-514-00601-6 SP - 292 EP - 293 PB - Verl. Stahleisen CY - Düsseldorf AN - OPUS4-695 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Bettge, Dirk A1 - Österle, Werner A1 - Ziebs, Josef T1 - Temperature dependence of yield strength and elongation of the nickel-base superalloy IN 738 LC and the corresponding microstructural evolution JF - Zeitschrift für Metallkunde PY - 1995 SN - 0179-4841 SN - 0044-3093 VL - 86 SP - 190 EP - 197 PB - Hanser CY - München AN - OPUS4-2481 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Fedelich, Bernard A1 - Frenz, Holger A1 - Österle, Werner A1 - Ohm, Katrin ED - Lütjering, G. T1 - A stochastic model for LCF small crack growth in a nickel-base superalloy T2 - Fatigue '96 T2 - 6th International Fatigue Congress CY - Berlin, Germany DA - 1996-05-06 PY - 1996 SN - 0-08-042268-3 VL - 96 IS - 2 SP - 1263 EP - 1268 PB - Pergamon CY - Oxford AN - OPUS4-2511 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Österle, Werner A1 - Portella, Pedro Dolabella A1 - Ziebs, Josef A1 - Jiao, Feng ED - Lütjering, G. T1 - Mechanical behaviour of alloy 800h under cyclic biaxial loading T2 - Fatigue '96 T2 - 6th International Fatigue Congress CY - Berlin, Germany DA - 1996-05-06 KW - Legierung KW - Belastung, zyklisch KW - Beanspruchung, mechanisch PY - 1996 SN - 0-08-042268-3 VL - 2 IS - 2 SP - 989 EP - 994 PB - Pergamon CY - Oxford AN - OPUS4-669 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Sievert, Rainer A1 - Österle, Werner A1 - Olschewski, Jürgen A1 - Ziebs, Josef T1 - Physical interpretation of a viscoplastic model applied to high temperature performance of a nickel-base superalloy T2 - Proceedings of the 7th International Conference on Mechanical Behaviour of Materials T2 - 7th International Conference on Mechanical Behaviour of Materials CY - The Hague, Netherlands DA - 1995-01-01 PY - 1995 SP - 557 EP - 558 CY - Den Haag AN - OPUS4-2507 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Dmitriev, A. I. A1 - Nikonov, A. Y. A1 - Österle, Werner T1 - Molecular dynamics modeling of the sliding performance of an amorphous silica nano-layer - The impact of chosen interatomic potentials JF - Lubricants N2 - The sliding behavior of an amorphous silica sample between two rigid surfaces is in the focus of the present paper. Molecular Dynamics using a classical Tersoff’s potential and a recently developed ReaxFF potential was applied for simulating sliding within a thin film corresponding to a tribofilm formed from silica nanoparticles. The simulations were performed at different temperatures corresponding to moderate and severe tribological stressing conditions. Simulations with both potentials revealed the need of considering different temperatures in order to obtain a sound interpretation of experimental findings. The results show the striking differences between the two potentials not only in terms of magnitude of the resistance stress (about one order of magnitude) but also in terms of friction mechanisms. The expected smooth sliding regime under high temperature conditions was predicted by both simulations, although with Tersoff’s potential smooth sliding was obtained only at the highest temperature. On the other hand, at room temperature Tersoff-style calculations demonstrate stick-slip behavior, which corresponds qualitatively with our experimental findings. Nevertheless, comparison with a macroscopic coefficient of friction is not possible because simulated resistance stresses do not depend on the applied normal pressure. KW - Molecular dynamics KW - Thin tribofilm KW - Resistance stress KW - Sliding simulation KW - Amorphous silica PY - 2018 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-449366 DO - https://doi.org/10.3390/lubricants6020043 SN - 2075-4442 VL - 6 IS - 2 SP - 43, 1 EP - 11 PB - MDPI CY - Basel AN - OPUS4-44936 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - RPRT A1 - Bresch, Harald A1 - Dörfel, Ilona A1 - Steinborn, Gabriele A1 - Krietsch, Arne A1 - Langner, Jeanette A1 - Schmidt, Martin A1 - Österle, Werner A1 - Seeger, Stefan T1 - Physical-chemical characterization of NM105(P25) N2 - NM 105, Ti02 (P25) could not be ignited as dust layer and dispersed in air as dust/air-mixture as well. This dust is not dust explosible and the burning behaviour corresponds to Burning Class 1 (no Ignition). The results have shown that the tested sample is thus not combustible at all, because it is already oxidized completely. KW - OECD KW - WPMN KW - TiO2 KW - NM105 KW - P25 KW - Sponsorship programme PY - 2012 SP - 1 EP - 18 PB - Bundesanstalt für Materialforschung und -prüfung (BAM) CY - Berlin AN - OPUS4-27322 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Österle, Werner A1 - Bresch, Harald A1 - Dörfel, Ilona A1 - Prietzel, Claudia A1 - Seeger, Stefan A1 - Fink, C. A1 - Giese, A. A1 - Walter, J. T1 - Surface film formation and dust generation during brake performance tests T2 - Braking 2009 T2 - Braking 2009 CY - York, UK DA - 2009-06-09 KW - Bremse KW - Dritter Körper KW - Verschleiß KW - Reibung KW - Nanocharakterisierung KW - Aerosol PY - 2009 SN - 978-1-84334-559-6 IS - C672/028/09 SP - 29 EP - 38 PB - Woodhead Publishing Ltd AN - OPUS4-19574 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -