Effects of Melt Treatment on Dendrite Coherency of A357 Alloy

Abstract:

The Dendrite Coherency Point (DCP) of A357 alloy was determined after different melt treatments by double thermocouples, and the coherency solid fraction (fscoh) was calculated by thermal analysis. The results of dendrite coherency properties show that fscoh values increase with increased cooling rate for A357 alloy. For A357 alloys, fscoh values increase after grain refined and melt superheat treatment. The coherency point was found to be dependent on not only the morphology of the dendrites but also the dendrite growth rate.

• Periodical: Advanced Materials Research (Volumes 189-193)
• Pages: 3886-3890
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.189-193.3886
• Online since: February 2011
• Authors: Zhong Wei Chen, Pei Chen, Li Fan
• Keywords: A357 Aluminum Alloy, Cooling Rate, Dendrite Coherency Point, Melt Treatment

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