Issues »  Volume 39, Issue 8

Features of Deformation, Hardening and Mass Transfer After Ultrasonic Impact Surface Treatment of an Aluminium Alloy D16 by Various Strikers

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

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

Received: 24.06.2017. Download: PDF

Features of the hardening process of the surface layers of an aluminium alloy D16 are investigated after ultrasonic impact treatment (UIT) by means of various strikers. The changes in microhardness of the D16 alloy after the UIT process carried out in the air and in an inert environment, regardless the striker material (steel AISI 52100 or Armco-Fe), have a cyclic nature that manifests themselves as the alternating hardening and softening stages. The periodicity of these stages is analysed for various strikers, and the incubation period is determined. At the air-UIT conditions, the maximum values of microhardness $HV$ are achieved in the case of the use of the AISI 52100 steel striker. In the inert medium, the higher $HV$ values of the D16 alloy are obtained at UIT using the Armco-Fe striker owing to the shock–friction interaction of instrument and surface as well as the activation of the mass transfer of Fe atoms in aluminium that results in the mechanical alloying of the surface layers. Features of the impact loading with various strikers, which determine the observed differences in the accumulated deformation and microhardness, are also considered.

Key words: ultrasonic impact treatment (UIT), striker, cladding, degree of strain, mass transfer, nanostructure.

URL: http://mfint.imp.kiev.ua/en/abstract/v39/i08/1097.html

DOI: https://doi.org/10.15407/mfint.39.08.1097

PACS: 43.35.+d, 62.20.Qp, 68.35.Dv, 68.35.Gy, 81.20.Hy, 81.65.-b, 83.50.Uv

Citation: M. O. Vasylyev, B. M. Mordyuk, S. I. Sidorenko, S. M. Voloshko, A. P. Burmak, and N. V. Franchik, Features of Deformation, Hardening and Mass Transfer After Ultrasonic Impact Surface Treatment of an Aluminium Alloy D16 by Various Strikers, Metallofiz. Noveishie Tekhnol., 39, No. 8: 1097—1117 (2017) (in Ukrainian)

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