Synthesis of Composite with the Eutectic Composition of Al–Cu/C System on the Surface of 2024 Aluminium Alloy by High-Frequency Impact Treatment
M. A. Vasylyev1, S. M. Voloshko2, V. I. Zakiev3, A. P. Burmak2, Ya. I. Matvienko1, A. D. Rud1
1G. V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
2National Technical University of Ukraine ‘Igor Sikorsky Kyiv Polytechnic Institute’, 37 Peremohy Ave., UA-03056 Kyiv, Ukraine
3National Aviation University, 1 Lyubomyr Huzar Ave., UA-03058 Kyiv, Ukraine
Received: 21.09.2021. Download: PDF
High-frequency impact treatment (HFIT) of 2024 aluminium alloy with addition of milled for 8 hours eutectic Al–Cu/C powder to the deformation zone is carried out. Structure and mechanical properties of the surface layers of the alloy after HFIT in the air at room temperature for 50 s without and with addition of the powder are studied and compared. As shown, the maximum hardening effect (the increase of microhardness by ∼3.5 times) is observed after HFIT of the sample with the powder. According to the results of multi-pass scratch tests, the lowest value of average indenter penetration depth (from 1.2 μm after the 1st pass to 2.3 μm after the 8th pass) is observed for the sample after the same treatment. Moreover, the above-mentioned results are also confirmed by three-dimensional surfaces topography. Thus, the highest values of roughness parameters (Ra = 1.31 μm, Rz = 4.49 μm) and the percentage increase in the area (by 12.4%) of the surface of the alloy are observed after HFIT with the powder. As shown by means of X-ray diffraction phase analysis, such treatment facilitated the formation of composite on the surface of 2024 aluminium alloy containing metastable Al4Cu9 and stable Al2Cu intermetallic phases. The effect of the powder addition during HFIT on the structure modification and the level of physical-mechanical properties of the alloy is considered.
Key words: high-frequency impact treatment, 2024 aluminium alloy, Al–Cu/C powders, composite, microhardness, surface.
URL: https://mfint.imp.kiev.ua/en/abstract/v43/i11/1455.html
DOI: https://doi.org/10.15407/mfint.43.11.1455
PACS: 61.05.cp, 62.20.Qp, 64.60.My, 68.35.Gy, 81.40.Pq, 81.65.-b
Citation: M. A. Vasylyev, S. M. Voloshko, V. I. Zakiev, A. P. Burmak, Ya. I. Matvienko, and A. D. Rud, Synthesis of Composite with the Eutectic Composition of Al–Cu/C System on the Surface of 2024 Aluminium Alloy by High-Frequency Impact Treatment, Metallofiz. Noveishie Tekhnol., 43, No. 11: 1455—1470 (2021) (in Ukrainian)