OBRABOTKAMETALLOV MATERIAL SCIENCE Том 23 № 3 2021 EQUIPMEN . INSTRUM TS Vol. 6 No. 1 2024 a b Fig. 2. Cross section of a hone tooth at magnifi cation of 15× (a) and 50× (b) The morphology and chemical composition of the hone material were studied using a scanning twobeam electron microscope. Fig. 4 a shows an electronic photograph of the annular gear cross section. Large white spots and smaller dark fragments, which are voids (craters), stand out on the surface. The craters were formed as a result of removal of aluminum powder when the test plate was cut off from the main material of the gear hone. The chemical composition was studied in the Area highlighted by a rectangle. This Area is shown in fi gure 4, b. The chemical composition of the annular gear of hone was determined by scanning the surface area of gray material inclusions (Area 1) and a surface area without visible inclusions (Area 2). Spot analysis was performed in the area of Spot 1 and Spot 2. Regardless of the size of the analyzed surface area, the diameter of the electronic probe was 50 nm. When scanning the surface, the number of measurements (spots) in the selected areas was assumed to be 400. The main chemical element in the X-ray images at Spot 1, Spot 2 and Area 1 is Al. As an example, fi gure 5, a shows an X-ray image obtained by scanning the surface of Area 1. Similar X-ray patterns were obtained at Spot 1 and Spot 2. The composition of the annular gear material was determined on the surface a b c Fig. 3. Cross-section of hone teeth with surface integrity failures
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