TY - CONF A1 - Kröll, Mirco A1 - Grundtner, R. A1 - Pagano, F. A1 - Nyberg, E. A1 - Heino, V. A1 - Spaltmann, Dirk A1 - Gradt, Thomas T1 - Auswirkungen von vereinheitlichten Prozeduren auf tribologische Versuche T2 - Reibung, Schmierung und Verschleiß. Forschung und praktische Anwendung N2 - Anerkannte Institutionen stellen ihre Kompetenzen auf dem Gebiet tribologischer Charakterisierungen Industrie und Forschung zur Verfügung (https://www.i-tribomat.eu/). Ein Aspekt hierbei ist eine tribologische Datenbank. Um die nötige Qualität der Daten sicherzustellen, sind vereinheitlichte Prozeduren erforderlich, in deren Auswirkungen dieser Vortrag einen Einblick gibt. T2 - 62. Tribologie-Fachtagung der Gesellschaft für Tribologie e. V. CY - Online meeting DA - 27.09.2021 KW - Datenbank KW - Tribologische Daten KW - Europäisches Tribologie-Zentrum PY - 2021 SN - 978-3-9817451-6-0 VL - 15 SP - 15/1 EP - 15/4 AN - OPUS4-53430 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Ayerdi, J. J. A1 - Aginagalde, A. A1 - Llavori, I. A1 - Bonse, Jörn A1 - Spaltmann, Dirk A1 - Zabala, A. T1 - Ball-on-flat linear reciprocating tests: Critical assessment of wear volume determination methods and suggested improvements for ASTM JF - Wear N2 - In the present work it was shown the importance of the correct selection, implementation, and reporting of wear volume computation method and quanitifies the potential errors. KW - Wear KW - Sliding KW - Surface KW - Analysis KW - ASTM KW - D7755-11 PY - 2021 DO - https://doi.org/10.1016/j.wear.2021.203620 VL - 470-471 SP - 3620 AN - OPUS4-52080 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kröll, Mirco A1 - Grundtner, R. A1 - Newrkla, K. A1 - Spaltmann, Dirk A1 - Pagano, F. A1 - Pinedo, B. A1 - Nyberg, E. A1 - Söderfjäll, M. A1 - Heino, V. A1 - Ronkainen, H. ED - Topolovec-Miklozic, K. ED - Pauschitz, A. ED - Fatemi, A. T1 - Trusted tribological materials characterisation services T2 - 23rd international colloquium tribology - Industrial and automotive lubrication - Conference proceedings 2022 N2 - Renowed institutions in various European countries combine their tribo-testing as well as analytical and characterisation capabilities for the European Tribology Centre. This foundation of one of the largest Open Innovative Test Beds for tribological services, the aim of the European Horizon 2020 project i-TRIBOMAT, places certain demands on the comparability of the test equipment and execution process. T2 - 23rd International Colloquium Tribology at TAE CY - Online meeting DA - 25.01.2022 KW - Tribology KW - i-TRIBOMAT KW - Characterisation KW - Digitalisation KW - Harmonisation KW - Round robin tests KW - Interlaboratory tests PY - 2022 SN - 978-3-8169-3547-6 SP - 503 EP - 505 PB - Narr Francke Attempto Verlag CY - Tübingen AN - OPUS4-54293 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kröll, Mirco A1 - Grundtner, R. A1 - Newrkla, K. A1 - Pagano, F. A1 - Nyberg, E. A1 - Heino, V. A1 - Spaltmann, Dirk T1 - On the quality of wear volume data of laboratory model tests T2 - Reibung, Schmierung und Verschleiß. Forschung und praktische Anwendung N2 - European tribological research organisations unify their capabilities for the European Tribology Centre (https://www.i-tribomat.eu/). At its core is a database, which data are made comparable and trusted via harmonised procedures for their generation. This contribution will focus on wear volume data. T2 - 63. Tribologie-Fachtagung 2022 CY - Göttingen, Germany DA - 26.09.2022 KW - Tribology KW - i-TRIBOMAT KW - Characterisation KW - Digitalisation KW - Harmonisation KW - Round robin tests KW - Interlaboratory tests KW - Wear volume PY - 2022 SN - 978-3-9817451-7-7 SP - 192 EP - 194 PB - Gesellschaft für Tribologie e.V. AN - OPUS4-55881 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Spaltmann, Dirk A1 - Ayerdi, J. A1 - Slachciak, Nadine A1 - Llavori, I. A1 - Zabala, A. A1 - Aginagalde, A. A1 - Bonse, Jörn T1 - Tribological performance of FS-laser-induced periodic surface structures on titanium alloy against different counter-body materials using a ZDDP lubricant additive N2 - In this study the so-called laser-induced periodic surface structures (LIPSS, ripples) were produced on titanium alloy (Ti6Al4V) surfaces upon scan processing in air by a Ti:sapphire femtosecond (fs) laser. The tribological performance of the resulting surfaces was qualified in linear reciprocating sliding tribological tests (RSTT) against balls made of different materials (100Cr6 steel/Al2O3/Si3N4) using different oil-based lubricants. The admixture of the additive 2-ethylhexylzinc-dithiophosphate (ZDDP) to a base oil containing only anti-oxidants and temperature stabilizers disclosed the synergy of the additive with the laser-oxidized nanostructures. This interplay between the laser-textured sample topography and the local chemistry in the tribological contact area reduces friction and wear. T2 - 7th World Tribology Congress - WTC 2022 CY - Lyon, France DA - 11.07.2022 KW - Lubricant additives KW - Laser-induced periodic surface structures (LIPSS) KW - Wear KW - Friction PY - 2022 AN - OPUS4-55318 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Cappella, Brunero A1 - Spaltmann, Dirk A1 - Gee, M. T1 - Editorial: Tribology and Atomic Force Microscopy - Towards Single Asperity Contact JF - Frontiers in Mechanical Engineering N2 - The concept behind this Research Topic (RT) was to collect works, in which Atomic Force Microscopy (AFM) techniques are employed to study tribological phenomena and to push the resolution of measurements towards single asperity contact. Thanks to the direct determination of sample height with sub-nanometer resolution and the possibility of measuring local friction, AFM can be employed after a tribotest to detect topography and friction changes at the nanometer scale. Recently, efforts are being expended to use AFM cantilevers as tribometers, i.e., as probes altering the volume of suitable samples, thereby measuring tip and/or sample wear and friction at the nano/microscale. Thus, single asperity contact, friction, and wear can be investigated. Since friction and wear at the macroscale are the result of asperities interactions, such experiments are of great importance for better understanding of tribological processes. KW - Nanotribology KW - Friction KW - Wear KW - Single asperity KW - AFM PY - 2022 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-571037 DO - https://doi.org/10.3389/fmech.2022.853934 SN - 2297-3079 VL - 8 SP - 1 EP - 2 PB - Frontiers Media CY - Lausanne AN - OPUS4-57103 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Maack, Stefan A1 - Benner, Philipp A1 - Kröll, Mirco A1 - Prager, Jens A1 - Daum, Werner A1 - Casperson, Ralf A1 - Heckel, Thomas A1 - Spaltmann, Dirk A1 - et al., ED - Wahlster, W. ED - Winterhalter, C. T1 - Deutsche Normungsroadmap künstliche Intelligenz Ausgabe 2 N2 - Im Auftrag des Bundesministeriums für Wirtschaft und Klimaschutz haben DIN und DKE im Januar 2022 die Arbeiten an der zweiten Ausgabe der Deutschen Normungsroadmap Künstliche Intelligenz gestartet. In einem breiten Beteiligungsprozess und unter Mitwirkung von mehr als 570 Fachleuten aus Wirtschaft, Wissenschaft, öffentlicher Hand und Zivilgesellschaft wurde damit der strategische Fahrplan für die KI-Normung weiterentwickelt. Koordiniert und begleitet wurden diese Arbeiten von einer hochrangigen Koordinierungsgruppe für KI-Normung und -Konformität. Mit der Normungsroadmap wird eine Maßnahme der KI-Strategie der Bundesregierung umgesetzt und damit ein wesentlicher Beitrag zur „KI – Made in Germany“ geleistet. Die Normung ist Teil der KI-Strategie und ein strategisches Instrument zur Stärkung der Innovations- und Wettbewerbsfähigkeit der deutschen und europäischen Wirtschaft. Nicht zuletzt deshalb spielt sie im geplanten europäischen Rechtsrahmen für KI, dem Artificial Intelligence Act, eine besondere Rolle. KW - Digitalisierung KW - Künstliche Intelligenz KW - Data Sciences KW - Normung Roadmap PY - 2022 SP - 1 EP - 448 AN - OPUS4-56576 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Herr, M. A1 - Borras, F. X. A1 - Spaltmann, Dirk A1 - Kröll, Mirco A1 - Pirker, F. A1 - Cihak-Bayr, U. T1 - How to create trusted tribological characterization data of soft polymers as input for FEM simulations? JF - Materials N2 - Soft polymers such as the investigated polyurethane, characterized by low Young’s moduli and prone to high shear deflection, are frequently applied in pneumatic cylinders. Their performance and lifetime without external lubrication are highly determined by the friction between seal and shaft and the wear rate. FEM simulation has established itself as a tool in seal design processes but requires input values for friction and wear depending on material, load, and velocity. This paper presents a tribological test configuration for long stroke, reciprocating movement, allowing the generation of data which meet the requirements of input parameters for FEM simulations without the geometrical influences of specific seal profiles. A numerical parameter study, performed with an FEM model, revealed the most eligible sample geometry as a flat, disc-shaped sample of the polymer glued on a stiff sample holder. At the same time, the study illustrates that the sensitivity of the contact pressure distribution to Poisson’s ratio and CoF can be minimized by the developed and verified setup. It ensures robust, reliable, and repeatable experimental results with uniform contact pressures and constant contact areas to be used in databases and FEM simulations of seals, enabling upscaling from generically shaped samples to complex seal profiles. KW - Tribologie KW - FEM KW - Simulation KW - Polymere KW - Charakterisierung KW - i-TRIBOMAT KW - Modellierung KW - Polyurethan KW - Dichtungen KW - Upscaling PY - 2023 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-567683 DO - https://doi.org/10.3390/ma16010131 SN - 1996-1944 VL - 16 IS - 1 SP - 1 EP - 20 PB - MDPI CY - Basel AN - OPUS4-56768 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Spaltmann, Dirk A1 - Ayerdi Gomez, A. A1 - Slachciak, Nadine A1 - Zubia Aranburu, J. A1 - Zabala, A. A1 - Aginagalde, A. A1 - Bonse, Jörn T1 - Improvement of the tribological performance of titanium alloy using FS-laser-induced periodic surface structures in combination with ZDDP and ionic liquid lubricant additives N2 - The performance of titanium alloy (Ti6Al4V) surfaces was investigated in lubricated reciprocating sliding tribological tests (RSTT). Special emphasis was laid on the effect of surface nanostructures in area of contact on the respective friction and wear behaviour. These so-called laser-induced periodic surface structures (LIPSS, ripples) were produced on the titanium alloy surface upon scan processing in air by an ultrashort pulsed femtosecond (fs) laser. As lubricant served two types of base oils, a pure polyalcylene-glycol, and an SAE 0W30 oil containing only antioxidants and temperature stabilizers. Tribological tests were carried out on polished as well as LIPSS covered areas using both types of base oil. A test metrics was established, combining the additive 2-ethylhexyl-zincdithiophosphate (ZDDP) or the ionic liquid [P6,6,6,14] [DEHP] (98% purity) with the respective base oils. The test metrics also considered the orientation of motion with respect to the orientation of the structures formed on the surface. Results are presented which show that the interplay between LIPSS and the local chemistry formed by the respective additives is beneficial for the tribological behaviour of the titanium alloy. Certain combinations of base oil, additive and LIPSS reduced friction and wear significantly in the tribological contact. T2 - 64. Tribologie-Fachtagung CY - Göttingen, Germany DA - 25.09.2023 KW - TiAl64V KW - 100Cr6 KW - Friction KW - Wear KW - LIPSS KW - Lubrication KW - PAG KW - Ionic liquid PY - 2023 AN - OPUS4-58641 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ayerdi Gomez, A. A1 - Slachciak, Nadine A1 - Zubia Aranburu, J. A1 - Zabala, A. A1 - Aginagalde, A. A1 - Bonse, Jörn A1 - Spaltmann, Dirk T1 - Improvement of the tribological performance of titanium alloy using FS-laser-induced periodic surface structures in combination with ZDDP and ionic liquid lubricant additives T2 - Tagungsband der 64. Tribologie-Fachtagung N2 - The performance of titanium alloy (Ti6Al4V) surfaces was investigated in lubricated reciprocating sliding tribological tests (RSTT). Special emphasis was laid on the effect of surface nanostructures in area of contact on the respective friction and wear behaviour. These so-called laser-induced periodic surface structures (LIPSS, ripples) were produced on the titanium alloy surface upon scan processing in air by an ultrashort pulsed femtosecond (fs) laser. As lubricant served two types of base oils, a pure polyalcylene-glycol, and an SAE 0W30 oil containing only antioxidants and temperature stabilizers. Tribological tests were carried out on polished as well as LIPSS covered areas using both types of base oil. A test metrics was established, combining the additive 2-ethylhexyl-zincdithiophosphate (ZDDP) or the ionic liquid [P6,6,6,14] [DEHP] (98% purity) with the respective base oils. The test metrics also considered the orientation of motion with respect to the orientation of the structures formed on the surface. Results are presented which show that the interplay between LIPSS and the local chemistry formed by the respective additives is beneficial for the tribological behaviour of the titanium alloy. Certain combinations of base oil, additive and LIPSS reduced friction and wear significantly in the tribological contact. T2 - 64. Tribologie-Fachtagung CY - Göttingen, Germany DA - 25.09.2023 KW - TiAl64V KW - 100Cr6 KW - Friction KW - Wear KW - LIPSS KW - Lubrication KW - PAG KW - Ionic liquid PY - 2023 SP - 1 EP - 5 AN - OPUS4-58642 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -