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Grain Refinement of Zn-25Al Alloy through the Addition of Zn-6Ti Master Alloy

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Abstract:

In this paper, Zn-6Ti master alloy was produced and characterized by XRD and SEM. It was found that α-Al dendritic grains in Zn-25Al alloy were remarkably refined after the addition of Zn-6Ti master alloy, with the size remarkably reduced and the morphology changed from complex dendrite to rose-like or granular (equiaxed particle) structure. Lower solidification temperature of the Zn-Al melt was found to further promote the formation of granular (equiaxed particle) α-Al grain in Zn-25Al alloy with the addition of Zn-6Ti master alloy. The mechanism for the grain refinement is discussed based on the SEM observation of TiAl 3-x Znx particles at the center of α-Al grain in Zn-25Al alloy.

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Periodical:

Advanced Materials Research (Volumes 562-564)

Pages:

322-325

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.562-564.322

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Online since:

August 2012

Authors:

Zhen Qing Wang, X.H. Zuo, Z.X. Yang, H.R. Geng

Keywords:

Grain Refinement, TiAl3-xZnx Particle, Zn-Al Alloy, Zn-Ti Intermetallics, Zn-Ti Master Alloy

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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