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Ratke, Lorenz (2005) Theoretical considerations and experiments on microstructural stability regimes in monotectic alloys. Materials Science and Engineering, 413-414, pp. 504-508.
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Abstract
Al–Bi and Al–In alloys of monotectic composition were directionally solidified with solidification velocities from 0.3 m/s to 5 m/s and temperature gradients from 2 K/mm to 6.5 K/mm. The monotectic reaction leads to three distinct microstructural morphologies: fibers, strings of pearls and irregular arrays of second phase droplets, depending on processing conditions. The transition from fibers to string of pearls seems to be a Nichols and Mullins instability. The formation of irregularly arranged drops is interpreted as an effect of repeated nucleation ahead of the solidification front.
| Item URL in elib: | https://elib.dlr.de/20497/ | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Document Type: | Article | ||||||||
| Title: | Theoretical considerations and experiments on microstructural stability regimes in monotectic alloys | ||||||||
| Authors: |
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| Date: | 2005 | ||||||||
| Journal or Publication Title: | Materials Science and Engineering | ||||||||
| Refereed publication: | Yes | ||||||||
| Open Access: | No | ||||||||
| Gold Open Access: | No | ||||||||
| In SCOPUS: | No | ||||||||
| In ISI Web of Science: | Yes | ||||||||
| Volume: | 413-414 | ||||||||
| Page Range: | pp. 504-508 | ||||||||
| Status: | Published | ||||||||
| Keywords: | Directional solidification, Immiscible alloys, Morphological transitions, Monotectic alloys, Al–Bi; Al–In | ||||||||
| HGF - Research field: | Aeronautics, Space and Transport (old) | ||||||||
| HGF - Program: | Space (old) | ||||||||
| HGF - Program Themes: | W FR - Forschung unter Weltraumbedingungen (old) | ||||||||
| DLR - Research area: | Space | ||||||||
| DLR - Program: | W FR - Forschung unter Weltraumbedingungen | ||||||||
| DLR - Research theme (Project): | W - Vorhaben Materialforschung unter Mikro-g (old) | ||||||||
| Location: | Köln-Porz | ||||||||
| Institutes and Institutions: | Institute of Materials Physics in Space > Institute of Space Simulation | ||||||||
| Deposited By: | Ratke, Prof. Lorenz | ||||||||
| Deposited On: | 15 Feb 2006 | ||||||||
| Last Modified: | 27 Apr 2009 04:46 |
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