Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-45288 Vortrag Rockenhäuser, Christian Long term ageing of alloy 2618A Results of the in vestigation of the "Long term ageing of alloy 2618A" were presented. 2018 ICAA 16 Montreal, Canada 17.06.2018 2018-06-26 OPUS4-46131 Posterpräsentation Rockenhäuser, Christian Influence of heat treatment and creep loading on an Al-Cu-Li alloy The influence of heat treatment and creep loading on the microstructure of an Al-Cu-Li alloy was investigated. Especially the formation of different precipitates (T1 and Theta') were characterized and the microstructural changes under different ageing conditions (with and without external strain) were investigated to determine the effect od stress on the ageing process. 2018 19th International Microscopy Congress (IMC19) Sydney, Australia 09.09.2018 14.09.2018 2018-10-02 OPUS4-46129 Vortrag Rockenhäuser, Christian Influence of heat treatment and creep loading on an Al-Cu-Li alloy The influence of heat treatment and creep loading on the microstructure of an Al-Cu-Li alloy was investigated. Especially the formation of different precipitates (T1 and Theta') were characterized and the microstructural changes under different ageing conditions (with and without external strain) were investigated to determine the effect od stress on the ageing process. 2018 19th International Microscopy Congress (IMC19) Sydney, Australia 09.09.2018 14.09.2018 2018-10-02 OPUS4-45287 Beitrag zu einem Tagungsband Rockenhäuser, Christian; Augenstein, E.; Skrotzki, Birgit Long term ageing of alloy 2618A The result of an Investigation of the "Long term ageing of alloy 2618A" are discussed. 2018 Proceedings of the International Conference on Aluminium Alloys 16 International Conference on Aluminium Alloys 16 Montreal, Canada 17.06.2018 Paper 400101 2018-06-26 OPUS4-44604 Beitrag zu einem Tagungsband Rockenhäuser, Christian; von Hartrott, P.; Metzger, M.; Schriever, Sina; Augenstein, E.; Karlin, J.; Piesker, Benjamin; Schweizer, Ch.; Skrotzki, Birgit Lebensdauerberechnung von Aluminium-Radialverdichterrädern unter Berücksichtigung der Werkstoffalterung In this project, a procedure was developed to improve the lifetime assessment precision of exhaust turbo charger radial compressor wheels made from the age hardenable aluminum alloy EN AW-2618A. This comprises particularly the consideration of material aging, which has to be anticipated during operation of such components under relevant service conditions (temperature, time, stress). First of all, a solid experimental database was established for the investigated material. This includes a mechanical as well as a microstructural characterization of the as-received state (T61) and after aging up to 25,000 h at relevant service temperatures (160 °C, 180 °C, 190 °C). The microstructural investigations focused on the development of the radii of the cylindrical hardening phase, which coarsens during aging. The relation between aging temperature, time and mechanical load (if applicable) was established for the first time to this extent. An interrelationship to describe the coarsening was established. The effect of aging on hardness, strength, creep behavior and fatigue lifetime (LCF, TMF) was studied and a correlation to the microstructure was established. The results of the creep tests were used to calibrate a modified hyperbolic sine creep model. A time and temperature dependent deformation model according to Chaboche, which describes the relevant phenomena of high temperature deformation and cyclic plasticity, was extended. It now considers material aging by describing the strength not only as a function of temperature but also as a function of aging, i.e. of the mean radius of the precipitates. A similar procedure was applied to extend the model in order to assess the fatigue lifetime. The calculated lifetimes of LCF and TMF tests completed during this project match well with the experimental results. Only one LCF test with a hold time of 900 s in tension deviates clearly from the mean value and shows the limits of the time independent damage model. Tests with shorter hold times of 60 s are within the scatter band, likewise the different aging conditions. A damage accumulation model additionally describing the progressive aging during lifetime was developed and implemented. Besides considering aging in the deformation and lifetime assessment, it is also possible to judge complex loading cycles in a postprocessing by rain flow classification of typical complex loading cycles. The methodology and the models were implemented into the Finite-Element software Abaqus and Ansys and are available for numerical assessment of components. 2018 Tagungsband R583 FVV Frühjahrstagung 2018 FVV Frühjahrstagung 2018 Bad Neuenahr, Germany 22.03.2018 97 130 2018-04-04 OPUS4-45286 Vortrag Skrotzki, Birgit Age hardening of a high purity Al-4Cu-1Li-0.25Mn alloy: Microstructural investigation and phase-field simulation Research results considering the "Age Hardening of a High Purity Al-4Cu-1Li-0.25Mn Alloy: Microstructural Investigation and Phase-Field Simulation" were presented. 2018 ICAA16 Montreal, Canada 17.06.2018 2018-06-26 OPUS4-45283 Vortrag von Hartrott, P. Correlation of the precipitate size evolution and the creep rate of the aluminum alloy EN AW 2618A at 190 °C Ther results of research on correlation of precipitate size Evolution and the creep rate of the Aluminium alloy EN AW 2618A at 190 °C was presented. 2018 ICAA16 Montreal, Canada 17.06.2018 2018-06-26 OPUS4-45284 Beitrag zu einem Tagungsband von Hartrott, P.; Rockenhäuser, Christian; Schriever, Sina; Skrotzki, Birgit Correlation of the precipitate size evolution and the creep rate of the aluminium alloy EN AW 2618A at 190 °C A short description of the work done on the topic "Correlation of the precipitate size evolution and the creep rate of the aluminium alloy EN AW 2618A at 190 °C" is given. 2018 Proceedings of the International Conference on Aluminium Alloys 16 978-1-926872-41-4 International Conference on Aluminium Alloys 16 Montreal, Canada 17.06.2018 99 2018-07-09