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Additive Technologies
ArticleName Dependence of the structure and properties of 03Kh16N15M3 steel on the geometry of cellular structures obtained by the selective laser melting method
ArticleAuthor P. V. Petrovsky, V. V. Cheverikin, P. Yu. Sokolov, A. A. Davidenko
ArticleAuthorData

National University of Science and Technology (Moscow, Russia):

P. V. Petrovsky, Cand Eng., e-mail: pavelpv@inbox.ru
V. V. Chevirikin, Cand. Eng., e-mail: chevirikin80@rambler.ru
P. Yu. Sokolov, e-mail: sokolov@misis.ru

 

All-Russian Institute of Light Alloys (Moscow, Russia):
A. A. Davidenko, e-mail: aleksandr_davidenko@oaovils.ru

Abstract

The studies of the process to obtain cellular structures from stainless 03Kh16N15M3 (316L) steel by the selective laser melting method (SLM) have been presented. The dependences of the microstructure and mechanical properties on the geometry of two types of cellular structures with a calculated volume of voids from 50 to 70 %: body-centered with vertical spacers and the «honeycomb» type have been investigated. Sample size was 10 × 10 × 10 mm. Depending on the geometry of the honeycomb structures, different course of the deformation curves and different values of the yield strength take place. A sample with the volume of voids equal to 70 % demonstrated the minimum yield strength value. When the difference in the volume of voids is 40 %, resulting from the use of the spacer of different width, the yield strength of the samples may differ by 3-5 times. It is shown that when comparing the mechanical properties of a cellular body-centered structure with vertical spacers and the “honeycomb” structure in the absence of a difference in the volume of voids, the maximum load with a deformation degree of 50 % for a “honeycomb” sample is 1.5 times lower than that of a sample with the body-centered structure with vertical spacers.
The study was financially supported by the RF Ministry of Education and Science in the framework of the agreement № 14.578.21.0210 dated 03.10.2016, unique № RFMEFI 57816X0210.

keywords Additive technologies, selective laser melting, stainless steels, cellular structure, topological optimization
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