Hardening of Additive Manufactured 316L Stainless Steel by Using Bimodal Powder Containing Nanoscale Fraction.

Autor: Filimonov AM; Center for Design, Manufacturing & Materials (CDMM), Skolkovo Institute of Science and Technology, 30 Bolshoy Boulevard Str., bld. 1, 121205 Moscow, Russia., Rogozin OA; Center for Design, Manufacturing & Materials (CDMM), Skolkovo Institute of Science and Technology, 30 Bolshoy Boulevard Str., bld. 1, 121205 Moscow, Russia., Firsov DG; Center for Design, Manufacturing & Materials (CDMM), Skolkovo Institute of Science and Technology, 30 Bolshoy Boulevard Str., bld. 1, 121205 Moscow, Russia., Kuzminova YO; Center for Design, Manufacturing & Materials (CDMM), Skolkovo Institute of Science and Technology, 30 Bolshoy Boulevard Str., bld. 1, 121205 Moscow, Russia., Sergeev SN; Institute of Metals Superplasticity Problems of the Russian Academy of Sciences (IMSP), 39 Stepana Khalturina Str., 450001 Ufa, Russia., Zhilyaev AP; Institute of Metals Superplasticity Problems of the Russian Academy of Sciences (IMSP), 39 Stepana Khalturina Str., 450001 Ufa, Russia.; Laboratory of Mechanics of Gradient Nanomaterials, Nosov Magnitogorsk State Technical University, 38 Lenin Str., 455000 Magnitogorsk, Russia., Lerner MI; Institute of Strength Physics and Materials Science of Siberian Branch of the Russian Academy of Sciences (ISPMS), 2/4 Akademicheskii pr., 634055 Tomsk, Russia.; Scientific and Educational Center 'Additive Technologies', National Research Tomsk State University, 36 Lenin Avenue, 634050 Tomsk, Russia., Toropkov NE; Institute of Strength Physics and Materials Science of Siberian Branch of the Russian Academy of Sciences (ISPMS), 2/4 Akademicheskii pr., 634055 Tomsk, Russia.; Scientific and Educational Center 'Additive Technologies', National Research Tomsk State University, 36 Lenin Avenue, 634050 Tomsk, Russia., Simonov AP; Center for Design, Manufacturing & Materials (CDMM), Skolkovo Institute of Science and Technology, 30 Bolshoy Boulevard Str., bld. 1, 121205 Moscow, Russia., Binkov II; Materials and technology, Bauman Moscow State Technical University, 2 Baumanskaya Str., bld. 5/1, 105005 Moscow, Russia., Okulov IV; Faculty of Production Engineering, University of Bremen, Badgasteiner Str. 1, 28359 Bremen, Germany.; Leibniz Institute for Materials Engineering-IWT, Badgasteiner Str. 3, 28359 Bremen, Germany., Akhatov IS; Center for Design, Manufacturing & Materials (CDMM), Skolkovo Institute of Science and Technology, 30 Bolshoy Boulevard Str., bld. 1, 121205 Moscow, Russia., Evlashin SA; Center for Design, Manufacturing & Materials (CDMM), Skolkovo Institute of Science and Technology, 30 Bolshoy Boulevard Str., bld. 1, 121205 Moscow, Russia.
Jazyk: angličtina
Zdroj: Materials (Basel, Switzerland) [Materials (Basel)] 2020 Dec 29; Vol. 14 (1). Date of Electronic Publication: 2020 Dec 29.
DOI: 10.3390/ma14010115
Abstrakt: The particle size distribution significantly affects the material properties of the additively manufactured parts. In this work, the influence of bimodal powder containing nano- and micro-scale particles on microstructure and materials properties is studied. Moreover, to study the effect of the protective atmosphere, the test samples were additively manufactured from 316L stainless steel powder in argon and nitrogen. The samples fabricated from the bimodal powder demonstrate a finer subgrain structure, regardless of protective atmospheres and an increase in the Vickers microhardness, which is in accordance with the Hall-Petch relation. The porosity analysis revealed the deterioration in the quality of as-built parts due to the poor powder flowability. The surface roughness of fabricated samples was the same regardless of the powder feedstock materials used and protective atmospheres. The results suggest that the improvement of mechanical properties is achieved by adding a nano-dispersed fraction, which dramatically increases the total surface area, thereby contributing to the nitrogen absorption by the material.
Databáze: MEDLINE
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