Authors: A.V. Zelenina, V.P. Gileta, A.G. Samul, A.V. Ivanova

Title of the article: Effect of the lubricant composition on the surface layer quality of titanium alloy parts during ultrasonic surface plastic deformation

Year: 2025, Issue: 5, Pages: 17-28

Branch of knowledge: 2.5.6. Engineering technology

Index UDK: 621.9.048.6

DOI: 10.26730/1999-4125-2025-5-17-28

Abstract: The features of titanium alloys, which are the basis of their distribution in various fields of industry, also lead to various difficulties in their processing, both by cutting and plastic deformation. This requires a more detailed study of the interaction of the part material, lubricant, and tool during the machining process. The work is devoted to determining the effect of ultrasonic surface plastic deformation (USSPD) on the formation of a stable microgeometric and physico-mechanical state of the surface layer (SL) of parts made of VT3-1 titanium alloy. An assessment was made of the influence of lubricating and cooling technological means (LCTM) on the USSPD process for the material in question, after which recommendations were given on their selection to obtain the necessary surface characteristics of the part. The analysis of the effect of the static load on the parameters of the surface layer obtained after processing of the USSPD is carried out. Various classes of products (liquid, grease) were considered as lubricants. It has been established that the use of ultrasonic surface-plastic deformation according to a tangential scheme using various lubricants ensures the formation of a stable regular microrelief with a cellular structure on parts made of titanium alloy VT3-1. At the same time, there is a decrease in the height-pitch characteristics of the roughness and an increase in the bearing capacity of the surface. The use of ultrasonic surface plastic deformation also made it possible to increase the microhardness of the surface layer by 25%. At the same time, the frequency of changes in the amount of increase in microhardness and decrease in roughness depends on the applied lubricant composition. It is established that the magnitude of the change in the parameters under consideration also depends on the static force applied during processing.

Key words: titanium alloys plastic defor-mation roughness microhardness surface quality

Receiving date: 18.04.2025

Approval date: 22.09.2025

Publication date: 23.10.2025

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