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:
The influence of an inclined cooling plate utilized as a modification in the compocastingprocess of aluminum alloy is studied in this paper. Based on the crystal separation theory, moltenA356 is poured on the inclined copper plate in order to produce solidification nuclei inside the fluidmetal, which is, then, mechanically stirred while reinforcement is added through its surface. Carbonnano fibers (CNF) and particulate SiC were utilized as reinforcement, in quantities varying from 0.5to 15vol%. Dispersion of the reinforcements was observed by macro and microstructure analysis. ForCNF, addition of quantities up to 1vol% resulted in homogeneous dispersion through the matrix,although SEM analysis showed the presence of clusters of up to 50μm in some points of the samples.SiC was properly mixed into matrix until 10vol%. Globular crystals were obtained, but somecoarsening occurred, especially for small quantities of reinforcement. Utilization of the inclinedcooling plate produced good inclusion and homogenization for two different reinforcements throughan A356 matrix. The best results were obtained for a 180mm cooling plate, with inclination of 60o.The pouring temperature utilized was 10oC over the melting point of the alloy, and temperature of thetundish was kept around 598oC during stirring
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.519-521.609.pdf
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