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Mikolajczak, Piotr und Ratke, Lorenz (2011) The role of fluid flow and intermetallic phases in the formation of the primary Al-phase in AlSi alloys. In: IOP Conf. Series: Materials Science and Engineering, 27 (012024). IOP Publishing Ltd, UK. ICASP 3, 7.-10. June 2011, Rolduc, Netherlands. ISSN 1757-899X
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Offizielle URL: http://iopscience.iop.org/1757-899X/27/1/012024
Kurzfassung
In secondary AlSi alloys, the presence of small amounts of Fe causes the formation of intermetallic phases, which have a negative effect on mechanical and physical properties of castings. To understand the effect of fluid flow on the microstructure and intermetallic phases, Al-5/7/9 wt pct Si 0.2/0.5/1.0 wt pct Fe alloys have been directionally solidified under defined thermal (gradient 3 K/mm, solidification velocity 0.04 mm/s) and fluid flow (rotating magnetic field 6 mT) conditions. The primary α-Al phase and intermetallic phases were studied using light microscopy and SEM with EDX. The influence of fluid flow and intermetallic phases (β- Al5FeSi) on microstructure was characterized by changes of primary and secondary dendrite arm spacing and specific surface area of the dendrites. We observe a pronounced effect of flow on the length of the intermetallic precipitates, a macro-segregation Fe and Si and even small amounts of iron and thus intermetallics reduce possible effects of flow on microstructural parameters.
| Dokumentart: | Konferenzbeitrag (Vortrag, Paper) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Titel: | The role of fluid flow and intermetallic phases in the formation of the primary Al-phase in AlSi alloys | |||||||||
| Autoren: |
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| Datum: | Dezember 2011 | |||||||||
| Erschienen in: | IOP Conf. Series: Materials Science and Engineering | |||||||||
| Referierte Publikation: | Ja | |||||||||
| In Open Access: | Nein | |||||||||
| In SCOPUS: | Nein | |||||||||
| In ISI Web of Science: | Ja | |||||||||
| Band: | 27 | |||||||||
| Herausgeber: |
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| Verlag: | IOP Publishing Ltd, UK | |||||||||
| ISSN: | 1757-899X | |||||||||
| Status: | veröffentlicht | |||||||||
| Stichwörter: | intermetallic phases, Al-castings, AlSi alloys, fluid flow | |||||||||
| Veranstaltungstitel: | ICASP 3 | |||||||||
| Veranstaltungsort: | Rolduc, Netherlands | |||||||||
| Veranstaltungsart: | internationale Konferenz | |||||||||
| Veranstaltungsdatum: | 7.-10. June 2011 | |||||||||
| HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | |||||||||
| HGF - Programm: | Raumfahrt | |||||||||
| HGF - Programmthema: | Forschung unter Weltraumbedingungen | |||||||||
| DLR - Schwerpunkt: | Raumfahrt | |||||||||
| DLR - Forschungsgebiet: | R FR - Forschung unter Weltraumbedingungen | |||||||||
| DLR - Teilgebiet (Projekt, Vorhaben): | R - Vorhaben Materialforschung unter Mikro-g (alt) | |||||||||
| Standort: | Köln-Porz | |||||||||
| Institute & Einrichtungen: | Institut für Materialphysik im Weltraum | |||||||||
| Hinterlegt von: | Ratke, Prof. Lorenz | |||||||||
| Hinterlegt am: | 31 Jan 2012 15:02 | |||||||||
| Letzte Änderung: | 09 Feb 2017 19:18 |
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