Issues »  Volume 39, Issue 9

Influence of Alloying on Mechanical Properties and Corrosion Resistance of High-Strength Eutectic ($\alpha$-Al + Mg$_2$Si) Alloys of the Al–Mg–Si Ternary System

L. G. Shcherbakova$^{1}$, A. V. Krinitskiy$^{1}$, N. P. Korzhova$^{1}$, T. M. Legka$^{2}$, A. V. Samelyuk$^{1}$

$^{1}$I. M. Frantsevich Institute for Problems in Materials Science, NAS of Ukraine, 3 Academician Krzhyzhanovsky Str., UA-03142 Kyiv, Ukraine
$^{2}$G.V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine

Received: 12.08.2017. Download: PDF

Effect of alloying on the mechanical and corrosion properties of new casting aluminium alloys is investigated. The alloys are fabricated on the base of monovariant ($\alpha$-Al + Mg$_2$Si) eutectics of the Al–Mg–Si ternary system and, in addition, they contain zinc and copper to realize dispersion hardening after appropriate heat treatment. Corrosion behaviour of these alloys in the 3% NaCl solution is studied by electrochemical (voltamperometric, chronopotentiometric) and gravimetric methods. As shown, in accordance with corrosion resistance scale, the alloy doped with zinc is stable, and the alloy doped with zinc and copper is very stable (< 10 $\mu$A/cm$^2$). The combination of high mechanical and corrosion properties allows us to assert that new high-strength eutectic ($\alpha$-Al + Mg$_2$Si) alloys of the Al–Mg–Si ternary system can compete with industrial casting aluminium alloys.

Key words: ternary Al–Mg–Si system, eutectic alloys, heat treatment, mechanical properties, corrosion.

URL: http://mfint.imp.kiev.ua/en/abstract/v39/i09/1239.html

DOI: https://doi.org/10.15407/mfint.39.09.1239

PACS: 61.72.S-, 62.20.F-, 81.05.Ni, 81.40.Cd, 81.40.Ef, 81.65.Kn, 82.45.Bb

Citation: L. G. Shcherbakova, A. V. Krinitskiy, N. P. Korzhova, T. M. Legka, and A. V. Samelyuk, Influence of Alloying on Mechanical Properties and Corrosion Resistance of High-Strength Eutectic ($\alpha$-Al + Mg$_2$Si) Alloys of the Al–Mg–Si Ternary System, Metallofiz. Noveishie Tekhnol., 39, No. 9: 1239—1252 (2017) (in Russian)

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