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Morphological stability of rod-shaped continuous phase
- Morphological transition of a rod-shaped phase into a string of spherical particles is commonly observed in the microstructures of alloys during solidification (Ratke and Mueller, 2006). This transition phenomenon can be explained by the classic Plateau-Rayleigh theory which was derived for fluid jets based on the surface area minimization principle. The quintessential work of Plateau-RayleighMorphological transition of a rod-shaped phase into a string of spherical particles is commonly observed in the microstructures of alloys during solidification (Ratke and Mueller, 2006). This transition phenomenon can be explained by the classic Plateau-Rayleigh theory which was derived for fluid jets based on the surface area minimization principle. The quintessential work of Plateau-Rayleigh considers tiny perturbations (amplitude much less than the radius) to the continuous phase and for large amplitude perturbations, the breakup condition for the rod-shaped phase is still a knotty issue. Here, we present a concise thermodynamic model based on the surface area minimization principle as well as a non-linear stability analysis to generalize Plateau-Rayleigh’s criterion for finite amplitude perturbations. Our results demonstrate a breakup transition from a continuous phase via dispersed particles towards a uniform-radius cylinder, which has not been found previously, but is observed in our phase-field simulations. This new observation is attributed to a geometric constraint, which was overlooked in former studies. We anticipate that our results can provide further insights on microstructures with spherical particles and cylinder-shaped phases.…
Document Type: | Article (reviewed) |
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Zitierlink: | https://opus.hs-offenburg.de/4346 | Bibliografische Angaben |
Title (English): | Morphological stability of rod-shaped continuous phase |
Author: | Fei Wang, Oleg Tschukin, Thomas Leisner, Haodong Zhang, Britta Nestler, Jasmin Aghassi-HagmannORCiDGND, Michael Selzer, Gabriel Cadilha Marques |
Year of Publication: | 2020 |
Publisher: | Elsevier Science |
First Page: | 20 |
Last Page: | 29 |
Parent Title (English): | Acta Materialia |
Volume: | 192 |
ISSN: | 1359-6454 (Print) |
ISSN: | 1359-6454 (Online) |
DOI: | https://doi.org/10.1016/j.actamat.2020.04.028 |
Language: | English | Inhaltliche Informationen |
Institutes: | Fakultät Elektrotechnik, Medizintechnik und Informatik (EMI) (ab 04/2019) |
Institutes: | Bibliografie | Formale Angaben |
Open Access: | Closed Access |
Licence (German): | Urheberrechtlich geschützt |