Issues »  Volume 47, Issue 4

Peculiarities of Atomic Migration in the Near-Surface Layers of the 2099 Al−Cu−Li Alloy during Ultrasonic Impact Treatment

O. V. Filatov$^{1}$, V. F. Mazanko$^{2}$, S. Ye. Bogdanov$^{1}$, B. M. Mordyuk$^{1}$, Ye. I. Bogdanov$^{1}$, S. P. Vorona$^{1}$, L. Kaczmarek$^{2}$, М. Klich$^{3}$

$^{1}$G. V. Kurdyumov Institute for Metal Physics, N.A.S. of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
$^{2}$Lodz University of Technology, 116 Zeromskiego Str., 90-924 Lodz, Poland
$^{3}$Institute of Security Technologies ‘MORATEX’, 3 Marii Sklodowskiej-Curie Str., 90-505 Lodz, Poland

Received: 18.12.2024; final version - 13.03.2025. Download: PDF

The redistribution of 60Со atoms in the near-surface layer 2099-T83 Al−Cu−Li alloy during ultrasonic impact treatment (UIT) is studied. As shown by microdurometric analysis, the UIT results in a significant hardening of 2099 Al−Cu−Li alloy. However, the increase in the UIT duration results in the microhardness decrease, which is explained by the stress-relaxation processes occurred in the alloy. The higher microhardness of the UIT-processed alloy is stable for more than a half year. The radioactive isotope technique reveals a nonmonotonic dependence of the 60Co-atoms’ distribution curves observed for the surface layers of the alloy samples UIT-processed for 60, 120 and 180 seconds. Moreover, the optimal mode is the UIT processing for 120 s. The calculated mass-transfer coefficients during UIT performed at room temperature match up the diffusion coefficients known for the stationary homogenizing annealing at premelting temperatures. The mass-transfer coefficient value for 60Со in 2099 Al−Cu−Li alloy during the room-temperature UIT exceeds the diffusion coefficient of 60Со into aluminium at Т = 300 K about ≅ 108 times that indicates that the phenomenon of anomalous mass transfer is realized.

Key words: ultrasonic impact treatment, diffusion, mass transfer, radioactive isotope, deformation, microhardness.

URL: https://mfint.imp.kiev.ua/en/abstract/v47/i04/0405.html

DOI: https://doi.org/10.15407/mfint.47.04.0405

PACS: 61.72.sh, 61.82.Bg, 62.0.Qp, 62.80.+f, 68.35.Fx, 81.40.Ef, 81.70.Jb

Citation: O. V. Filatov, V. F. Mazanko, S. Ye. Bogdanov, B. M. Mordyuk, Ye. I. Bogdanov, S. P. Vorona, L. Kaczmarek, and М. Klich, Peculiarities of Atomic Migration in the Near-Surface Layers of the 2099 Al−Cu−Li Alloy during Ultrasonic Impact Treatment, Metallofiz. Noveishie Tekhnol., 47, No. 4: 405—414 (2025)

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