Funct. Mater. 2025; 32 (2): 297-305.

doi:https://doi.org/10.15407/fm32.02.297

Influence of the contact geometry of tribo pair metal elements on fretting-corrosion wear

M.V. Kindrachuk1, O.I. Dukhota1, V.V. Kharchenko1, T.S. Cherepova2, A.O. Kornienko1, V.B. Melnyk1, A.O. Yurchuk1

1National Aviation University, 1 Liubomyra Guzara ave, 03058, Kyiv, Ukraine
2G. V. Kurdyumov Institute for Metal Physics of the N.A.S. of Ukraine, 36 Acad. Vernadsky Boulevard, 03142, Kyiv, Ukraine

Abstract: 

Some issues of the dependence of the wear value of tribocouple materials on the contact geometry and dimensions of tribocouple elements, as well as on the fretting loading amplitude are considered. The research was carried out using the "plane-cylinder" contact scheme and planar annular contact of a solid or a segmented ring with the end surface of the cylinder on samples made of titanium alloys VT20, VT8, and VT22 and aluminum alloy D16T. The comparative tests in the "plane-cylinder" scheme on samples made of VT20, VT8, and D16T alloys showed an increase in wear value with an increase in the relative displacement of the surfaces. Using electron microscopic and X-ray spectral analyses, the mechanism of formation of protective secondary structures on the friction surface was studied. It was shown that the critical amplitude of fretting above which the wear value increases sharply is smaller for this type of contact; this provides better opportunities for removing wear products from the friction zone.

Keywords: 
contact geometry, fretting-corrosion, relative vibration displacement, protective structures, wear

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