ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Technical Al-Si alloys always contain sufficient amounts of Fe and Mn, especially alloysmade from scrap. During casting, Fe-containing intermetallics, such as Al-Fe, Al-Fe-Si and Al-Fe-Mn-Si phases, are formed between the aluminum dendrites. Fe and Mn-rich intermetallic phases arewell known to be strongly influential on mechanical properties in Al-Si alloys. In the present workthe influence of controlled fluid flow conditions on the morphology and spatial arrangement onintermetallic phases in cast Al-Si alloys is characterized. A binary Al-7wt.%Si and a ternary Al-7wt.%Si-1wt.%Fe alloy was solidified under and without the influence of a rotating magnetic field(3mT at 50Hz) over a range of solidification velocities (0.015- 0.18mm/s) at a constant temperaturegradient G of 3K/mm. The scientific results reached so far indicate a strong influence of theelectromagnetic stirring on the primary dendrite and secondary dendrite arm spacings
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.519-521.1795.pdf
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