TY - CONF A1 - Rockenhäuser, Christian T1 - Microstructural investigations of an Al-2618 alloy N2 - Results of Microstructural investigations of an Al-2618 alloy are summrised and discussed. T2 - FVV Arbeitskreissitzung CY - Berlin, Germany DA - 13.05.2015 KW - Aluminium alloy KW - Transmission electron microscopy KW - Microstructure KW - Degradation PY - 2015 AN - OPUS4-42197 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Rockenhäuser, Christian A1 - Schriever, Sina A1 - Piesker, Benjamin A1 - Skrotzki, Birgit T1 - Microstructural characterisation and creep of 2618A N2 - Results concerning the creep behavoiur and microstructure of Aluminium alloy 2618A were presented and discussed. T2 - AK-Sitzung CY - Frankfurt, Germany DA - 15.10.2015 KW - Aluminium alloy 2618A KW - Microstructure KW - Creep KW - Degradation KW - Transmission electron microscopy PY - 2015 AN - OPUS4-42201 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Rockenhäuser, Christian A1 - Schriever, Sina A1 - Piesker, Benjamin A1 - Skrotzki, Birgit T1 - Microstructural evolution of the S-phase in aluminium alloy 2618A during ageing and creep N2 - The degradation of alloy 2618A due to coarsening of the S-phase was investigated. Dark-field transmission electron microscopy (DFTEM) results are presented and the discussed focusing on the implications considering the degradation mechanism. T2 - 15th International Conference on Aluminium Alloys (ICAA 15) CY - Chongqing, China DA - 12.06.2016 KW - 2618A KW - Dark-field transmission electron microscopy (DFTEM) KW - Coarsening KW - S-phase KW - Microstructure PY - 2016 AN - OPUS4-36704 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Rockenhäuser, Christian A1 - Schriever, Sina A1 - Piesker, Benjamin A1 - Skrotzki, Birgit T1 - Microstructural characterisation of ageing and creep of 2618A N2 - Presentation of microstructural characterisation results for alloy 2618A T2 - Projektausschusssitzung mit Industrivertretern der Forschungsvereinigung Verbrennungskraftmaschinen (FVV) CY - Frankfurt a. M., Germany DA - 07.04.2016 KW - Dark-field transmission electron microscopy (DFTEM) KW - 2618A KW - S-Phase KW - Coarsening KW - Microstructure PY - 2016 AN - OPUS4-36705 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Rockenhäuser, Christian A1 - Schriever, Sina A1 - Piesker, Benjamin A1 - Skrotzki, Birgit T1 - Quantitative determination of microstructural parameters from TEM – Part II N2 - Presentation of quantitative microstructural parameter determination from Transmission electron microscopy (TEM) T2 - DFG Priority Program 1713 Docus Group Meeting CY - Berlin, Germany DA - 27.06.2016 KW - Dark-field transmission electron microscopy (DFTEM) KW - 2618A KW - S-Phase KW - Volume fraction KW - Microstructure PY - 2016 AN - OPUS4-36706 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Rockenhäuser, Christian A1 - Schriever, Sina A1 - Piesker, Benjamin A1 - Skrotzki, Birgit T1 - Microstructural characterisation of ageing and creep of 2618A N2 - The degradation process of alloy 2618A was investigated and results especially regarding volume fractions are presented. An ageing model for the alloy is tentatively formulated. However, the presence of dislocations remains questionable. T2 - Working Group Meeting Research Association for Combustion Engines CY - Frankfurt, Germany DA - 24.11.2016 KW - Alloy 2618A KW - Dark-field transmission electron microscopy KW - Degradation KW - Microstructure KW - Volume fraction PY - 2016 AN - OPUS4-42246 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Rockenhäuser, Christian A1 - Schriever, Sina A1 - Piesker, Benjamin A1 - Skrotzki, Birgit T1 - Microstructural characterisation and creep of alloy 2618A N2 - Dark-field Transmission electron microscopy (DFTEM) results were obtained and presented. The results are discussed with regard to additional microstructural characterisation of the primyra Phase and creep experiments of alloy 2618A. Different methods to determine the volume fractions of precipitate phases are presented. T2 - Working group meeting of the Research Association for Combustion Engines CY - Frankfurt, Germany DA - 07.04.2016 KW - Alloy 2618A KW - Dark-field transmission electron microscopy KW - Microstructure KW - Degradation KW - Volume fraction PY - 2016 AN - OPUS4-42220 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Rockenhäuser, Christian A1 - Schriever, Sina A1 - Skrotzki, Birgit ED - Panfilov, Peter ED - Kodzhaspirov, Georgii T1 - Microstructural evolution during creep of Al-alloy 2618A N2 - The aluminum alloy 2618A is an Al-Cu-Mg alloy with additions of Fe and Ni, which was designed for long-term operation at elevated temperature in transportation and aerospace industries. Typical applications include aircraft parts and structures (sheet material) or engine components such as turbo charger centrifugal compressor wheels (forged material). Such components are subjected to prolonged aging during service, (e.g. 50 000 h) at temperatures which are close to their age hardening temperature (ca. 190 °C). The microstructural evolution during creep exposure is studied. T2 - Creep 2017 CY - St. Petersburg, Russia DA - 19.07.2017 KW - Creep KW - Microstructure KW - Coarsening KW - TEM PY - 2017 SN - 978-5-7422-5799-8 SP - 80 EP - 81 PB - SpbPU Publisher CY - St. Petersburg, Russia AN - OPUS4-40750 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Rockenhäuser, Christian A1 - Schriever, Sina A1 - von Hartrott, P. A1 - Piesker, Benjamin A1 - Skrotzki, Birgit T1 - Comparison of long-term radii evolution of the S-phase in aluminum alloy 2618A during ageing and creep N2 - A study was made on the effect of creep loading on the precipitate radii evolution of the aluminum alloy 2618A. The overageing process of the alloy was investigated under load at a temperature of 190 °C with stresses between 79 and 181 MPa and compared to stress free isothermal ageing. The precipitates responsible for strength were characterized using dark-field transmission electron microscopy (DFTEM). This allows the experimental Determination of radii distributions of the rod-shaped Al2CuMg precipitates and the evaluation regarding their mean precipitate radius. It was found that the mean precipitate radius enables the comparison of the different microstructural conditions of crept and uncrept samples. The mean precipitate radii of the samples experiencing creep are significantly higher than those of undeformed samples. It was shown that the acquired radii distributions are viable to determine averaged particle radii for comparison of the aged samples. A ripening process including pipe diffusion along dislocations describes the data on coarsening very well for the creep samples. KW - Aluminum alloys KW - Electron microscopy KW - Aging KW - Creep KW - Microstructure KW - S-Phase PY - 2018 U6 - https://doi.org/10.1016/j.msea.2018.01.033 SN - 0921-5093 VL - 716 SP - 78 EP - 86 PB - Elsevier B. V. AN - OPUS4-44090 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - von Hartrott, P. A1 - Metzger, M. A1 - Rockenhäuser, Christian A1 - Skrotzki, Birgit T1 - Lifetime assessment of aging materials N2 - Materials subjected to high-temperature service conditions will change their microstructure with time. Associated with this aging process is a change of mechanical properties as well as a change of damage mechanisms. Within the scope of the FVV project Aging and Lifetime, Fraunhofer IWM in Freiburg and BAM in Berlin (both Germany) experimentally characterized the widespread high-temperature aluminum alloy EN AW-2618A in different overaging states. Based on the experimental findings, models for numerical lifetime assessment with the finite-element method were implemented. KW - Aluminum alloy KW - Aging KW - Microstructure KW - Lifetime prediction KW - Damage PY - 2018 U6 - https://doi.org/10.1007/s38313-018-0084-7 SN - 2192-9114 VL - 79 IS - 10 SP - 64 EP - 68 PB - Springer AN - OPUS4-46065 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -