Anomalous kinetics, patterns formation in recalescence, and final microstructure of rapidly solidified Al-rich Al-Ni alloys
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
Anomalous kinetics, patterns formation in recalescence, and final microstructure of rapidly solidified Al-rich Al-Ni alloys
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| Автор |
Galenko, P. K.
Toropova, L. V. Alexandrov, D. V. Phanikumar, G. Assadi, H. Reinartz, M. Paul, P. Fang, Y. Lippmann, S. |
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| Тематика |
DENDRITIC MICROSTRUCTURE
MICROGRAVITY NUCLEATION AND GROWTH RAPID SOLIDIFICATION ALUMINUM ALLOYS BINARY ALLOYS DENDRITES (METALLOGRAPHY) ELECTROMAGNETIC PROPULSION GROWTH KINETICS MICROGRAVITY PROCESSING MORPHOLOGY NICKEL ALLOYS NUCLEATION PHASE INTERFACES RAPID SOLIDIFICATION SPACE STATIONS UNDERCOOLING DENDRITIC MICROSTRUCTURE FINAL MICROSTRUCTURES GROWTH FRONT INTERNATIONAL SPACE STATIONS KINETIC PATTERNS NUCLEATION AND GROWTH PATTERN FORMATION RAPIDLY SOLIDIFIED THERMODYNAMICAL UNDERCOOLINGS MICROGRAVITY |
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| Описание |
From thermodynamical consideration, rather a monotonically increasing crystal growth velocity with increasing undercooling is expected in the crystallization of liquids, mixtures, and alloys [P.K. Galenko and D. Jou, Physics Reports 818 (2019) 1]. By contrast to this general theoretical statement, Al-rich Al-Ni alloys show an anomalous solidification behavior: the solid-liquid interface velocity slows down as the undercooling increases [R. Lengsdorf, D. Holland-Moritz, D. M. Herlach, Scripta Materialia 62 (2010) 365]. It is also found that besides the anomalous growth behaviour, changes in the shape of the recalescence front as the growth front morphology occur. In the light of recent measurements in microgravity with an Al-25at.% Ni alloy sample onboard the International Space Station (ISS) results confirming this anomalous behavior as an unexpected trend in solidification kinetics are presented. The measurements show multiple nucleation events forming the growth front, a mechanism that has been observed for the first time in Al-Ni alloys [D. Herlach et al., Physical Review Materials 3 (2019) 073402; M. Reinartz et al. JOM 74 (2022) 2420] and summarized with detailed analysis in the present publication over a wider range of concentrations. Particularly, the experimental measurements and obtained data directly demonstrate that the growth front does thus not consist of dendrite tips (as in usual rapid solidifying samples), but of newly forming nuclei propagating along the sample surface in a coordinated manner. Theoretical analysis on intensive nucleation ahead of crystal growth front is made using the previously developed model [D.V. Alexandrov, Journal of Physics A: Mathematical and Theoretical 50 (2017) 345101]. Using equations of this model, quantitative calculations confirm the interpretation of experimentally observed propagation of the recalescence front and obtained data on the microstructure of droplets solidified in electromagnetic levitation facility (EML) on the Ground, under reduced gravity during parabolic flights, and in microgravity conditions onboard the ISS. © 2022
DLR-Köln FSU-Jena German Space Center - Space Administration, (50WM1941) Hans-Jürgen Hempel and Jürgen Brozek Institut für Materialphysik im Weltraum Johannes Wilke Microgravity User Support Center European Space Agency, ESA, (15236/02/NL/SH) Deutsche Forschungsgemeinschaft, DFG, (GA 1142/11-1) Deutsches Zentrum für Luft- und Raumfahrt, DLR Russian Science Foundation, RSF, (21-19-00279) The present work is dedicated to the blessed memory of Professor Dieter Matthias Herlach who made a study of rapid solidification qualitatively clear and quantitatively accessible. The financial support by the European Space Agency (ESA) within the project NEQUISOL under contract No. 15236/02/NL/SH for experimental measurements under reduced gravity and by RSF under project No. 21-19-00279 for theoretical modeling is acknowledged. P.K.G. acknowledges the support from the German Space Center - Space Administration under contract No. 50WM1941 and Y.F. acknowledges the support of the German Science Foundation (DFG) under the Project GA 1142/11-1 for experimental measurements on the Ground. The authors specially thank ESA and its representative Dr. Wim Sillekens for the opportunity to use the ISS-EML and the team from Microgravity User Support Center (MUSC) at Deutsches Zentrum für Luft- und Raumfahrt (DLR-Köln) for the support with the Electromagnetic Levitator onboard the International Space Station (ISS-EML). Valuable discussions with Matthias Kolbe and Andrew Mullis on solidification behaviour of Al-Ni alloys are acknowledged. The experiments on Al-reach Al-Ni alloys and, especially, on Al-25% Ni were carried out in cooperation with the Institut für Materialphysik im Weltraum at the DLR-Köln. For support with the carrying out EML experiments in DLR-Köln we thank Stefan Burggraf and Stefanie Koch. Authors specially thanks Johannes Wilke, Hans-Jürgen Hempel and Jürgen Brozek for the support with in-house equipment by FSU-Jena. |
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| Дата |
2024-04-22T15:53:45Z
2024-04-22T15:53:45Z 2022 |
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| Тип |
Article
Journal article (info:eu-repo/semantics/article) Published version (info:eu-repo/semantics/publishedVersion) |
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| Идентификатор |
Galenko, PK, Toropova, LV, Alexandrov, DV, Phanikumar, G, Assadi, H, Reinartz, M, Paul, P, Fang, Y & Lippmann, S 2022, 'Anomalous kinetics, patterns formation in recalescence, and final microstructure of rapidly solidified Al-rich Al-Ni alloys', Acta Materialia, Том. 241, 118384. https://doi.org/10.1016/j.actamat.2022.118384
Galenko, P. K., Toropova, L. V., Alexandrov, D. V., Phanikumar, G., Assadi, H., Reinartz, M., Paul, P., Fang, Y., & Lippmann, S. (2022). Anomalous kinetics, patterns formation in recalescence, and final microstructure of rapidly solidified Al-rich Al-Ni alloys. Acta Materialia, 241, [118384]. https://doi.org/10.1016/j.actamat.2022.118384 Ranjbari, M., Shams Esfandabadi, Z., Gautam, S., Ferraris, A., & Scagnelli, S. D. (2023). Waste management beyond the COVID-19 pandemic: Bibliometric and text mining analyses. Gondwana Research: International Geoscience Journal, 114, 124–137. doi:10.1016/j.gr.2021.12.015 1359-6454 Final All Open Access; Green Open Access; Hybrid Gold Open Access https://doi.org/10.1016/j.actamat.2022.118384 https://doi.org/10.1016/j.actamat.2022.118384 http://elar.urfu.ru/handle/10995/132491 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85124399971&doi=10.1016%2fj.gr.2021.12.015&partnerID=40&md5=78ff54649114c16f9dbf7b238dc0cd09 45181327 10.1016/j.actamat.2022.118384 85139593564 912735200004 |
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en
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| Права |
Open access (info:eu-repo/semantics/openAccess)
cc-by |
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application/pdf
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Acta Materialia Inc
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| Источник |
Acta Materialia
Acta Materialia |
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