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Research on Effect of La on Microstructure in Semi-Solid A356 Alloy

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Abstract:

Semi-solid A356 alloy slurry grain-refined by Al-La master alloy is prepared by low superheat pouring. The effects of La on the morphology and size of primary grain in semi-solid A356 alloy are researched. The results indicate that the semi-solid A356 alloy slurry with particle-like and rosette-like primary grains can be prepared by low superheat pouring. The size and morphology of the primary grain in semi-solid A356 alloy are markedly improved by La. The refining mechanism of La on the morphology and size of the primary grain in semi-solid A356 alloy is delved. The eutectic reaction of Al-La binary alloy provides the effective nuclei for formation of the primary grains in semi-solid A356 alloy.

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Periodical:

Advanced Materials Research (Volumes 139-141)

Pages:

693-697

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.139-141.693

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Online since:

October 2010

Authors:

Xiao Mei Liu, Zheng Liu, Yong Mei Hu

Keywords:

A356 Aluminum Alloy, Lanthanum, Low Superheat Pouring, Semi-Solid

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© 2010 Trans Tech Publications Ltd. All Rights Reserved

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