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Open AccessArticle

Crystallization and Structure of AlSi10Mg0.5Mn0.5 Alloy with Dispersion Strengthening with Al–FexAly–SiC Phases

1
Faulty of Materials Engineering and Metallurgy 1, Silesian University of Technology, 40-019 Katowice, Poland
2
Faculty of Transport 2, Silesian University of Technology, 40-019 Katowice, Poland
*
Author to whom correspondence should be addressed.
Metals 2019, 9(8), 865; https://doi.org/10.3390/met9080865
Received: 11 June 2019 / Revised: 15 July 2019 / Accepted: 25 July 2019 / Published: 8 August 2019
(This article belongs to the Special Issue Modern Trends in Foundry)
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Abstract

The paper characterizes a composite with dispersion phases cast via the use of stir casting method on an aluminum matrix. A mixture of aluminum with FexAly and SiC powders was achieved in the process of mechanical alloying and self-propagating high temperature synthesis (ASHS). Chemical composition of agglomerates was chosen in such a way that the strengthening components made up 25% of the mass of the AlSi10Mg0.5Mn0.6 (EN AC-43400) alloy matrix. The characteristic temperatures of crystallization of the tested alloy were measured by thermal analysis ATD (analysis thermal derivative). A change of chemical and phase composition was confirmed in the elements of the intermetallic phase FeAl in the aluminum matrix. A silumin casting structure was achieved, with the matrix including micro-areas of ceramic phases and intermetallic phases, which are characteristic for hybrid strengthening. A refinement of dendrites in solid solution α was found, together with a transition from a binary plate eutectic composition α(Al) + β(Si) into modified eutectic composition. View Full-Text
Keywords: Al-Si cast alloys; ATD thermal analysis; crystallization Al-Si cast alloys; ATD thermal analysis; crystallization
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Piątkowski, J.; Wieszała, R. Crystallization and Structure of AlSi10Mg0.5Mn0.5 Alloy with Dispersion Strengthening with Al–FexAly–SiC Phases. Metals 2019, 9, 865.

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