Obrabotka Metallov 2020 Vol. 22 No. 2

OBRABOTKAMETALLOV Vol. 22 No. 2 2020 38 EQUIPMENT. INSTRUMENTS References 1. Nosenko V.A. K voprosu ob intensivnosti kontaktnogo vzaimodeistviya d-perekhodnykh metallov s karbidom kremniya pri shlifovanii [On contact interaction intensity of d-transition metals with silicon carbide in grinding]. Problemy mashinostroeniya i nadezhnosti mashin = Journal of Machinery Manufacture and Reliability , 2002, no. 5, pp. 78–84. (In Russian). 2. Xu X., Yu Y., Huang H. Mechanisms of abrasive wear in the grinding of titanium (TC4) and nickel (K417) alloys. Wear , 2003, vol. 255, pp. 1421–1426. DOI: 10.1016/S0043-1648(03)00163-7. Morphology and Chemical Composition of the Titanium Alloy Surface at the Initial Stage of Grinding with a Cubic Boron Nitride Wheel Vladimir Nosenko a, * , Aleksandr Fetisov b , Semen Kuznetsov c Volzhsky Polytechnic Institute (Branch), Volgograd State Technical University, 42a Engelsa Street, Volzhsky, 404121, Russian Federation a https://orcid.org/0000-0002-5074-1099, vladim.nosenko2014@yandex.ru , b https://orcid.org/0000-0001-7388-7931, fetisov@volpi.ru , c https://orcid.org/0000-0002-6924-3380, cemen1894@yandex.ru Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2020 vol. 22 no. 2 pp. 30–40 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2020-22.2-30-40 Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov ARTICLE INFO Article history : Received: 20 March 2020 Revised: 20 April 2020 Accepted: 14 May 2020 Available online: 15 June 2020 Keywords : Surface morphology chemical composition X-ray spectral microanalysis Grinding Titanium alloy Cubic boron nitride Corundum Ceramic bond Funding The reported study was funded by RFBR, project number 19-38- 90322/19 ABSTRACT Introduction . Intensive adhesive interaction is considered to be one of the main reasons for poor machining of titanium alloys by grinding and mutual transfer of materials in contact. Wear products of the grinding wheel embedded in the treated surface are stress concentrators, which signi fi cantly reduces the fatigue strength of the material when operating products under alternating loads. This research area is actively developing and is based on the latest world achievements in the fi eld of surface quality control. To a greater extent, the mutual transfer of materials is considered when grinding wheels made of silicon carbide, to a lesser extent – with wheels made of superhard materials. Objective. Investigation of the morphology and chemical composition of the surface of a titanium alloy after grinding with a wheel of cubic boron nitride on a ceramic bond using the latest world achievements in the fi eld of surface quality control. Methods. The state of the relief and chemical composition of the treated surfaces of the titanium alloy VT1-00 are studied using a FEI Versa 3D LoVac raster two-beam electron microscope immediately after the grinding wheel was corrected and after the speci fi ed allowance was removed. Grinding is performed on a precision pro fi le grinding machine CHEVALIER mod. Smart-B1224III. Results and discussion. The condition of the treated surface, obtained immediately after the grinding wheel is corrected, indicates a fairly intensive interaction of the tool with the metal being processed. As the processing time increases, the surface condition improves. Based on morphological studies, wear products of the abrasive tool are found on the surface. Its sizes and distinctive characteristics are determined. By the method of microprobe analysis the chemical composition is established fragments of crystals. According to the atomic content of chemical elements, objects are divided into three groups. Conclusions. The presence of wear products of CBN abrasive tools on a ceramic bundle on the surface of a titanium alloy is experimentally proved: CBN crystals, fi ller (corundum) and a ceramic bundle. Wear products are embedded in the treated surface. For citation: Nosenko V.A., Fetisov A.V., Kuznetsov S.P. Morphology and chemical composition of the titanium alloy surface at the initial stage of grinding with a cubic boron nitride wheel. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science , 2020, vol. 22, no. 2, pp. 30–40. DOI: 10.17212/1994-6309-2020-22.2-30-40. (In Russian). ______ * Corresponding author Nosenko Vladimir A. , Ph.D. (Engineering), Associate Professor Volzhsky Polytechnic Institute (Branch), Volgograd State Technical University, 42a Engelsa Street, 404121, Volzhsky, Russian Federation Tel.: +7-904-403-31-74, e-mail: vladim.nosenko2014@yandex.ru