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Effect of Chemical Composition and Heat Treatment on the Mechanical Properties and Electrical Conductivity of Al–Mg–Si Alloys with a Mg/Si Ratio of 1
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Effect of Chemical Composition and Heat Treatment on the Mechanical Properties and Electrical Conductivity of Al–Mg–Si Alloys with a Mg/Si Ratio of 1

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Abstract:

The mechanical properties and electrical conductivity of the Al–0.15Fe–0.5Si–0.5Mg–0.2Mn alloy with a Mg/Si ratio of 1 were investigated using optical microscopy, scanning and transmission electron microscopy, tensile testing, Vickers hardness measurements, and specific electrical resistivity measurements. To analyze the electrical conductivity data, the unit % IACS was used, calculated as a percentage relative to the conductivity of annealed copper. The alloy was studied in the as-cast condition, in the deformed condition (following extrusion and drawing), and after heat treatments: HT1 — solution treatment at 530°C and aging at 140°C for 8 hours, and HT2 - solution treatment at 560°C and aging at 175°C for 6 hours. The microstructure of the investigated alloy varied depending on the condition and heat treatment parameters, consisting of an aluminum matrix and strengthening particles with different morphologies and chemical compositions. For rods in the as-cast state, the conductivity was 55% IACS, ultimate tensile strength (UTS) — 150 MPa, and elongation — 14%. After HT1: 51% IACS, UTS — 140 MPa, elongation — 19%. After HT2: 51% IACS, UTS — 195 MPa, elongation — 19%.

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Periodical:

Key Engineering Materials (Volume 1046)

Pages:

11-17

DOI:

https://doi.org/10.4028/p-Sm0Dxs

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Online since:

March 2026

Authors:

Nataliya Zakharova*, Mykola Iefimov, Victor Goncharuk, Victor Kuprin, Anatoly Sameliuk, Oleksii Muzyka

Keywords:

Al-Mg-Si Conductive Alloys, Electrical Conductivity, Heat Treatment, Mechanical Properties, Mg/Si Content, Structure

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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