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

Abstract:

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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

DOI:

10.4028/www.scientific.net/AMR.383-390.4683

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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Price:

$35.00

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