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$^{2}$
$^{1}$Национальный технический университет Украины «Киевский политехнический институт имени Игоря Сикорского», просп. Победы, 37, 03056 Киев, Украина
$^{2}$Институт металлофизики им. Г. В. Курдюмова НАН Украины, бульв. Академика Вернадского, 36, 03142 Киев, Украина
$^{3}$Киевский академический университет НАН и МОН Украины, бульв. Академика Вернадского, 36, 03142 Киев, Украина
$^{4}$Национальный авиационный университет, просп. Любомира Гузара, 1, 03058 Киев, Украина
Получена: 15.08.2022; окончательный вариант - 12.09.2022. Скачать: 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.
Ключевые слова: surface mechanical attrition treatment, high-frequency mechanical impact, surface, residual stress, microhardness, phase composition.
URL: https://mfint.imp.kiev.ua/ru/abstract/v44/i11/1453.html
PACS: 43.35.+d, 61.72.Ff, 81.65.-b, 83.10.Tv, 85.40.-e