Issues »  Volume 44, Issue 5

Structure Phase State and Properties of Аl–6Мg Alloy after Electric Discharge Alloying with Tungsten and Ultrasonic Finishing

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

$^{1}$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: 07.04.2022. Download: PDF

The efficiency of modification of the surface layers of Al–6Mg aluminium alloy by combined treatment, including electric discharge surface alloying (EDSA) with Tungsten and finishing ultrasonic impact treatment (UIT) to improve the microstructure, strength and corrosion properties is analysed. The results of electron microscopic and x-ray structural phase analyses indicate the formation of the surface layer containing Al–W solid solution and Al$_{4}$W or Al$_{12}$W intermetallic phases, which cause hardening. Micro-durometric analysis shows that the combined (EDSA (W) + UIT) process doubled the microhardness of the surface layers as compared to the initial state. As shown, the modified surface possesses the increased anti-corrosion properties owing to the accelerated formation of the passivating oxide film due to the large number of intergranular and interfacial boundaries.

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

URL: https://mfint.imp.kiev.ua/en/abstract/v44/i05/0639.html

DOI: https://doi.org/10.15407/mfint.44.05.0639

PACS: 43.35.+d, 61.72.Ff, 81.40.-z, 81.65.-b, 81.65.Kn, 83.10.Tv

Citation: V. V. Mohylko, A. P. Burmak, S. M. Voloshko, S. I. Sidorenko, and B. N. Mordyuk, Structure Phase State and Properties of Аl–6Мg Alloy after Electric Discharge Alloying with Tungsten and Ultrasonic Finishing, Metallofiz. Noveishie Tekhnol., 44, No. 5: 639—658 (2022) (in Ukrainian)

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