Mass Transfer During Ultrasonic Shock Treatment of Al—Fe

M. O. Vasyliev$^{1}$, B. M. Mordyuk$^{1}$, S. I. Sidorenko$^{2}$, S. M. Voloshko$^{2}$, A. P. Burmak$^{2}$

$^{1}$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: 29.10.2015. Download: PDF

The processes of anomalous mass transfer are studied in Al—Fe system at ultrasonic shock treatment (USST) of the D16 aluminium alloy with intermediate Armco-Fe plate. This treatment passes under conditions of quasi-hydrostatic compression of diffusion couple in a neutral atmosphere to eliminate the influence of the oxidation process of contacting surfaces. The maximum Fe concentration in the subsurface layers of the D16 alloy after treatment with the amplitude of the ultrasonic converter $A = 25$ $\mu$m for 100 s is around 10—12 at.%. An unexpected phenomenon is the Cu surface segregation (up to $\cong$ 30 at.%) in local areas of the surface. After such USST on the contact surface of Armco-Fe, the content of Al reaches 90 at.%, meanwhile the mass transfer of other D16 alloy components, Cu, Mg, and Mn, occurs. The increase of the surface D16 aluminium alloy microhardness value after USST in contact with the plate of Armco-Fe is due to decrease of coherent scattering region size, increase of lattice microdeformation level, and mechanochemical interaction of Al with Fe and Cu during intensive deformation.

Key words: ultrasonic impact treatment, mechanical alloying, mass transfer.



PACS: 43.35.+d, 61.72.Dd, 61.72.Ff, 62.20.Qp, 81.20.Ev, 81.40.Ef, 81.65.-b

Citation: M. O. Vasyliev, B. M. Mordyuk, S. I. Sidorenko, S. M. Voloshko, and A. P. Burmak, Mass Transfer During Ultrasonic Shock Treatment of Al—Fe, Metallofiz. Noveishie Tekhnol., 37, No. 12: 1603—1618 (2015) (in Ukrainian)

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