Issues »  Volume 44, Issue 2

Enhancement of Mechanical and Anticorrosion Properties of Al–6Mg Alloy Surface Using Electric Discharge Alloying by Ti and High-Frequency Impact Treatment

V. V. Mohylko$^{1}$, A. P. Burmak$^{1}$, S. M. Voloshko$^{1}$, S. I. Sidorenko$^{1}$, B. N. Mordyuk$^{1,2}$

$^{1}$National Technical University of Ukraine ‘Igor Sikorsky Kyiv Polytechnic Institute’, 37 Peremohy Ave., UA-03056 Kyiv, Ukraine
$^{2}$G. V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine

Received: 30.09.2021; final version - 13.10.2021. Download: PDF

The microstructure, hardening and corrosion properties of the surface layers of aluminium alloy AMg6, modified by ultrasonic impact treatment (UIT) and by complex treatment, which combined electric discharge surface alloying (EDSA) with titanium and UIT, are analyzed. X-ray diffraction phase analysis and transmission electron microscopy showed that the combined treatment (EIL + UIT) leads to a double increase in microhardness compared to UIT due to the formation of a TiAl solid solution and Ti$_{x}$Al$_{y}$ intermetallic phases, as well as some quantity of oxides. The EDSA + UIT process leads to the highest corrosion resistance of AMg6 alloy in aqueous solution of 3.5% NaCl, which is manifested itself in an increase in the corrosion potential by 40–70 mV as compared to that registered for the sample after UIT, due to the formed structural-phase state of the modified surface.

Key words: ultrasonic impact treatment, electric discharge surface alloying, microstructure, microhardness, corrosion.

URL: https://mfint.imp.kiev.ua/en/abstract/v44/i02/0223.html

DOI: https://doi.org/10.15407/mfint.44.02.0223

PACS: 43.35.+d, 61.72.Ff, 81.40.Cd, 81.40.-z, 81.65.-b, 81.65.Kn

Citation: V. V. Mohylko, A. P. Burmak, S. M. Voloshko, S. I. Sidorenko, and B. N. Mordyuk, Enhancement of Mechanical and Anticorrosion Properties of Al–6Mg Alloy Surface Using Electric Discharge Alloying by Ti and High-Frequency Impact Treatment, Metallofiz. Noveishie Tekhnol., 44, No. 2: 223—240 (2022) (in Ukrainian)

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