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Microsegregation Effect of Copper in Solidification of A356 Alloy

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Abstract:

In this study, the microsegregation effect of copper during solidification of A356.2 aluminum casting alloy was evaluated by using solidification simulation and a series of experimental works. Electron probe micro analysis (EPMA) and the computational simulation revealed clearly that copper as a solute element segregates during solidification and it becomes more significant as the solidification approaches its completion. This microsegregation effect of copper is due to accumulated copper solute ahead of the eutectic interface during solidification. Consequently, the presence of a higher content of copper in A356.2 aluminum casting alloy causes influence on the solidification characteristics of the alloy and forms copper enriched phases at the last region to solidify in the microstructures.

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Periodical:

Materials Science Forum (Volumes 539-543)

Pages:

452-456

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.539-543.452

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Online since:

March 2007

Authors:

Jae Ik Cho, Xin Yan, Chang Seog Kang, Ik Hyun Oh, Jae Seol Lee, Hyeon Taek Son, Jung Chan Bae

Keywords:

A356 Aluminum Alloy, Aluminium Silicon Alloy, Copper (Cu), Microsegregation, Solidification

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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