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Effect of Zirconium on the Solidification Path and Structural Properties of Commercial AlSi10MgCu Alloys

Hajduch P., Djurdjevic M. B., Bolibruchová D., Simicevic Z.

Archives of Metallurgy and Materials

2020

Vol. 65, iss. 2

549--554

Comprehensive understanding of the melt quality is of vital importance for foundry man. The effect of each particular element need to be properly analysed. Therefore, the aim of this paper was to analyse the impact of various content of zirconium on the solidification path and structural characteristics (SDAS, grain size, porosity) of as cast commercial AlSi10MgCu alloys. It has been found that addition of zirconium up to 0.24 wt.% reduce significantly the grains size (from 3.5 mm to 1.2 mm), SDAS (from 57.3 μm to 50.4 μm) and porosity (from 19% to 5%), leading to production of sound cast parts.

Impact of Zirconium on the Structural and Mechanical Properties of Commercial AlSi10MgCu Alloys

Hajduch P., Djurdjevic M. B., Bolibruchová D., Simicevic Z.

Archives of Metallurgy and Materials

2019

Vol. 64, iss. 3

1107--1110

The impact of small addition of zirconium in hypoeutectic commercial AlSi10MgCu alloys on their mechanical properties (hardness) in as cast and thermally treated conditions was investigated. Small addition of zirconium does not change significantly the as cast and heat-treated microstructure of investigated alloys except to reduce the SDAS and grain size of primary α-aluminium phases. Addition of zirconium up to 0.14 wt. percentage increases the hardness of investigated alloys in as cast conditions. The increase in the hardness of samples after various solid solution times can correlate very well with the formation of small needle like coherent Al3Zr particles.