Journal article
Authors list: Rockenhauser, Christian; Rowolt, Christian; Milkereit, Benjamin; Darvishi Kamachali, Reza; Kessler, Olaf; Skrotzki, Birgit
Publication year: 2021
Pages: 8704-8716
Journal: Journal of Materials Science
Volume number: 56
Issue number: 14
ISSN: 0022-2461
eISSN: 1573-4803
Open access status: Hybrid
DOI Link: https://doi.org/10.1007/s10853-020-05740-x
Publisher: Springer
Abstract:
The aluminum alloy 2618A is applied for engine components such as radial compressor wheels which operate for long time at elevated temperatures. This results in coarsening of the hardening precipitates and degradation in mechanical properties during the long-term operation, which is not taken into account in the current lifetime prediction models due to the lack of quantitative microstructural and mechanical data. To address this issue, a quantitative investigation on the evolution of precipitates during long-term aging at 190 degrees C for up to 25,000 h was conducted. Detailed transmission electron microscopy (TEM) was combined with Brinell hardness measurements and thorough differential scanning calorimetry (DSC) experiments. The results show that GPB zones and S-phase Al2CuMg grow up to < 1,000 h during which the GPB zones dissolve and S-phase precipitates form. For longer aging times, only S-phase precipitates coarsen, which can be well described using the Lifshitz-Slyozov-Wagner theory of ripening. A thorough understanding of the underlying microstructural processes is a prerequisite to enable the integration of aging behavior into the established lifetime models for components manufactured from alloy 2618A.
Citation Styles
Harvard Citation style: Rockenhauser, C., Rowolt, C., Milkereit, B., Darvishi Kamachali, R., Kessler, O. and Skrotzki, B. (2021) On the long-term aging of S-phase in aluminum alloy 2618A, Journal of Materials Science, 56(14), pp. 8704-8716. https://doi.org/10.1007/s10853-020-05740-x
APA Citation style: Rockenhauser, C., Rowolt, C., Milkereit, B., Darvishi Kamachali, R., Kessler, O., & Skrotzki, B. (2021). On the long-term aging of S-phase in aluminum alloy 2618A. Journal of Materials Science. 56(14), 8704-8716. https://doi.org/10.1007/s10853-020-05740-x
Keywords
AL-CU-MG
