Influence of Intermetallics Modification by Melt-Shearing Treatment on Mechanical Properties of Iron-Containing Al-Si-Mg Casting Alloy

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This study aims to investigate the influence of intermetallics morphological modification on mechanical properties of iron-containing Al-Si-Mg casting alloys. The modification of the intermetallics was performed by using melt-shearing treatment prior to commercial high pressure die casting. The process parameters of the melt-shearing treatment were controlled and optimized based on the theoretical consideration of the intermetallics formation behavior. It was found that the mechanical properties of low-iron containing Al-Si-Mg alloy was improved due to the modification of primary α-Al from dendritic to globular form by the melt-shearing. Regarding to high-iron containing Al-Si-Mg alloy, harmful morphology of intermetallics was successfully modified by the melt-shearing at semi-solid region, which results in the improvement of mechanical properties such as elongation.

Info:

Periodical:

Advanced Materials Research (Volumes 383-390)

Edited by:

Wu Fan

Pages:

4683-4687

Citation:

B. H. Kim et al., "Influence of Intermetallics Modification by Melt-Shearing Treatment on Mechanical Properties of Iron-Containing Al-Si-Mg Casting Alloy", Advanced Materials Research, Vols. 383-390, pp. 4683-4687, 2012

Online since:

November 2011

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$38.00

[1] M. Hitchcock, Y. Wang and Z. Fan: Acta. Mater. Vol. 55 (2007), p.1589.

[2] O. Lashkari and R. Ghomashchi: : Mater. Sci. Eng. A Vol. 486 (2008), p.333.

[3] P. Ashtari, H. Tezuka and T. Sato: Scr. Mater. Vol. 53 (2005), p.937.

[4] S.G. Shabestari and S. Ghodrat: Mater. Sci. Eng. A Vol. 467 (2007), p.150.

[5] Z. Fan, G. Liu and M. Hitchcock: Mater. Sci. Eng. A Vol. 413-414 (2005), p.229.