Surface Hardening of Ti6Al4V Alloy Using High-Frequency Mechanical Impacts
A. P. Burmak$^{1}$, S. M. Voloshko$^{1}$, B. M. Mordyuk$^{1,2}$, T. A. Krasovskyi$^{3}$, V. I. Zakiev$^{1,4}$, I. A. Vladymyrskyi$^{1}$, M. A. Vasylyev$^{2}$
$^{1}$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
$^{3}$Kyiv Academic University, N.A.S. and M.E.S. of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
$^{4}$National Aviation University, 1 Lyubomyr Huzar Ave., UA-03058 Kyiv, Ukraine
Received: 15.08.2022; final version - 12.09.2022. Download: PDF
A comparison of the effects of high-frequency hardening by balls (SMAT) and local high-frequency mechanical impact (HFMI) treatment by an impact element on the micromechanical characteristics and microstructure-phase state of the surface of the Ti6Al4V (ВТ6) alloy is carried out. The SMAT processing of the sample surface is carried out in the air for 30–240 s with steel balls of 2 mm in diameter, the movement of which was induced by an ultrasonic sonotrode oscillating at a frequency of $\cong$ 20 kHz. The results are compared with the HFMI processing by cylindrical steel striker of 5 mm in diameter under comparable time regimes. The mechanical characteristics are determined based on the instrumental indentation data, and the microstructure parameters and the presence of the oxide phases on the surface are determined by x-ray diffraction analysis. The features of the microhardness changes and XRD based data regarding the macrostresses, crystallite size, and microstructure-phase state after high-frequency impact treatments of various ultrasonic excitations are established.
Key words: surface mechanical attrition treatment, high-frequency mechanical impact, surface, residual stress, microhardness, phase composition.
URL: https://mfint.imp.kiev.ua/en/abstract/v44/i11/1453.html
DOI: https://doi.org/10.15407/mfint.44.11.1453
PACS: 43.35.+d, 61.72.Ff, 81.65.-b, 83.10.Tv, 85.40.-e
Citation: A. P. Burmak, S. M. Voloshko, B. M. Mordyuk, T. A. Krasovskyi, V. I. Zakiev, I. A. Vladymyrskyi, and M. A. Vasylyev, Surface Hardening of Ti6Al4V Alloy Using High-Frequency Mechanical Impacts, Metallofiz. Noveishie Tekhnol., 44, No. 11: 1453—1474 (2022) (in Ukrainian)