The effect of grain refining on macrosegregation and dendrite arm spacing of direct chill cast AA5182

Glenn, A, Russo, S and Paterson, P 2003, 'The effect of grain refining on macrosegregation and dendrite arm spacing of direct chill cast AA5182', Metallurgical and Materials Transactions, vol. 34A, no. 7, pp. 1513-1523.


Document type: Journal Article
Collection: Journal Articles

Title The effect of grain refining on macrosegregation and dendrite arm spacing of direct chill cast AA5182
Author(s) Glenn, A
Russo, S
Paterson, P
Year 2003
Journal name Metallurgical and Materials Transactions
Volume number 34A
Issue number 7
Start page 1513
End page 1523
Total pages 11
Publisher Minerals Metals Materials Society
Abstract The effect of titanium and titanium diboride inoculation on the spatial variation of local solidification time for direct chill (DC) cast ingots of aluminum alloy 5182 (AA5182) was studied. The results have been compared to those of an ingot cast without grain refining. To accomplish this, the effect of grain refining on a number of ingot characteristics such as grain size, macrosegregation, spatial variation of dendrite arm spacing, and thermal conductivity was investigated. Furthermore, the effect of grain refining on the well-known relationship between dendrite arm spacing and local solidification time had to be established for AA5182. The results indicated that the spatial variation of dendrite arm spacing in the industrial ingots was independent of grain refining, although the nonrefined ingot produced significantly finer dendrite arm spacings in its center. This was attributed to the influence of showering crystals in the nonrefined ingot. The relationship between dendrite arm spacing and local solidification time was also found to be independent of grain refining.
Subject Materials Engineering not elsewhere classified
DOI - identifier 10.1007/s11661-003-0263-1
ISSN 1073-5623
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