Obrabotka Metallov 2020 Vol. 22 No. 1

OBRABOTKAMETALLOV Vol. 22 No. 1 2020 111 MATERIAL SCIENCE References 1. Shintani T., Murata Y. Evaluation of the dislocation density and dislocation character in cold rolled Type 304 steel determined by pro fi le analysis of X-ray diffraction. Acta Materialia , 2011, vol. 59, pp. 4314–4322. DOI: 10.1016/j.actamat.2011.03.055. The Effect of the Structural State of AISI 321 Stainless Steel on Surface Quality During Turning Nikolay Shamarin 1, a,* , Andrey Filippov 1, b , Sergei Tarasov 1, 2, c , Oleg Podgornykh 2, d , Veronika Utyaganova 1, e 1 Institute of Strenght Physics and Materials Sciences SB RAS, 2/4, pr. Akademicheskii, Tomsk, 634055, Russian Federation 2 National Research Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk, 634050, Russian Federation a https://orcid.org/0000-0002-4649-6465, shnn@ispms.ru, b https://orcid.org/0000-0003-0487-8382, avf@ispms.ru , c https://orcid.org/0000-0003-0702-7639, tsy@ispms.ru , d https://orcid.org/0000-0002-7758-9242, podgornysh.o.a@mail.ru , e https://orcid.org/0000-0002-2303-8015, fi laret_2012@mail.ru Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2020 vol. 22 no. 1 pp. 102–113 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2020-22.1-102-113 Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov ARTICLE INFO Article history : Received: 14 December 2019 Revised: 30 December 2019 Accepted: 07 February 2020 Available online: 15 March 2020 Keywords : Stainless steel Severe plastic deformation Cutting Surface microgeometry Funding The reported study partly funded by RFBR according to the research project № 18-38-00058. Structural studies were carried out in the framework of the Program of Fundamental Scienti fi c Research of state academies of sciences for 2013-2020, direction III.23 (project No. АААА - А 19-119051590004-5). ABSTRACT Introduction. The development and continuous improvement of methods, technologies and equipment for the implementation of severe plastic deformation (SPD) helps to reduce the cost of producing ultra fi ne- grained (UFG) materials with improved physical and mechanical properties. Thereby, such materials become more accessible for use in full production of various objects. Cutting, and in particular turning, is the most common method of manufacturing products. However, at the moment there is a lack of information about the in fl uence of the structural state of UFG materials on the qualitative characteristics of the surface after turning. The purpose of the work: to study the effect of structural conditions in AISI 321 stainless steel on the quality of its machining during turning. In this work , samples of AISI 321 stainless steel in the state as received and after structure formation are investigated using modern metal-cutting tools and equipment, as well as recommended cutting conditions. The methods of investigation are mechanical tests for compression and tension, transmission electron microscopy, optical metallography, laser scanning microscopy. Results and discussion . Based on the obtained experimental data, it can be concluded that SPD is an effective way to improve the quality of surface machining when turning AISI 321 stainless steel. For example, structure formation using SPD signi fi cantly reduces the roughness parameters of Sa and Sz. For better cutting quality and strength, rolling after ABC pressing is more ef fi cient. The obtained results indicate a great potential for using of products from bulk UFG materials in industry due to the possibility of combining high mechanical properties and quality of dimensional machining. The data obtained can be applied in the design of technological processes for the machining of AISI 321 stainless steel with an ultra fi ne-grained structure under conditions of full production engineering. For citation: Shamarin N.N., Filippov A.V., Tarasov S.Yu., Podgornykh O.A. Utyaganova V.R. The Effect of the Structural State of AISI 321 Stainless Steel on Surface Quality During Turning. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science , 2020, vol. 22, no. 1, pp. 102–113. DOI: 10.17212/1994-6309-2020-22.1-102-113. (In Russian). ______ * Corresponding author Shamarin Nikolay N., Junior Researcher Institute of Strenght Physics and Materials Sciences SB RAS, 2/4, pr. Akademicheskii, 634055, Tomsk, Russian Federation Tel.: 8 (905) 079-07-29, e-mail: shnn@ispms.ru