Structural Modification of Hypereutectic Al-16.5mass%Si Alloy by Thermo-Mechanical Treatment with ECAP

Victor Spuskanyuk¹, Alla Berezina², Victor Dubodelov³, Oleksandr Davydenko^1, , Vladyslav Fikssen³, Kristina Sliva¹ and Tetyana Monastyrska²

¹Department of Technological Studies of Hydroextrusion Processes, Donetsk O.O.Galkin Institute for Physics and Engineering, National Academy of Sciences of Ukraine, Donetsk, Ukraine

²Department of Constitution and Properties of Solid Solutions, G.V.Kurdyumov Institute for Metal Physics, National Academy of Sciences of Ukraine, Kyiv, Ukraine

³Department of magnetohydrodynamics, Physico-Technological Institute of Metals and Alloys, National Academy of Sciences of Ukraine, Kyiv, Ukraine

Cite this paper:
Victor Spuskanyuk, Alla Berezina, Victor Dubodelov, Oleksandr Davydenko, Vladyslav Fikssen, Kristina Sliva and Tetyana Monastyrska. Structural Modification of Hypereutectic Al-16.5mass%Si Alloy by Thermo-Mechanical Treatment with ECAP. Materials Science and Metallurgy Engineering. 2014; 2(3):35-40. doi: 10.12691/msme-2-3-2

Abstract

Evolution of the microstructure and mechanical properties of the hypereutectic Al-16.5mass%Si-3.77mass%Cu alloy by treatment in the liquid state by magnetohydrodynamic (MHD) and hydrodynamic (HD) methods, followed by processing in the solid state by equal channel angular pressing (ECAP) method and thermal treatment has been investigated. This alloy has in initial state a very low value of plasticity at room temperature. Optical microscopy technique was employed in order to determine the evolution of the microstructure after different operating conditions of ECAP and thermal treatments. It was demonstrated that it is possible to significantly improve mechanical properties of this alloy by means of combining a low number of ECAP passes after an adequate combination of MHD+HD processing and thermal treatments.

Keywords:
Aluminum Alloy ECAP thermal treatment microstructure mechanical properties

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