Samara National Research University (Samara, Russia):

A. V. Agapovichev, Senior Lecturer, Dept. of Engine Manufacturing Technologies,
V. V. Kokareva, Cand. Eng., Senior Lecturer, Dept. of Engine Manufacturing Technologies;
V. P. Alekseev, Senior Lecturer, Dept. of Engine Manufacturing Technologies;
V. G. Smelov, Cand. Eng., Executive Director of the Institute of Engines and Power Plants

E-mail: agapovichev5@mail.ru

M. Yu. Anurov, General Director of AN-Turbo Ltd., took part in the work

The technology of selective laser melting of heat-resistant alloys is of great interest in the aerospace industry, because it allows you to implement a more complex geometry of parts in comparison with traditional technologies. This paper presents the results of determining the rational technological parameters of scanning a metal powder of a heat-resistant alloy Inconel 738. By statistical processing of experimental data to determine the effect of technological parameters of scanning on the tensile strength of a material, rational technological parameters of scanning are established, namely, the laser radiation power is 325 W, the scanning step is 0,12 mm, scanning speed of 677 mm/s, which corresponds to a bulk energy density of 80 J/mm³. The results of tests of cylindrical samples manufactured at angles of 0°, 30°, 45°, 60° and 90° to the uniaxial tension building platform are presented. A study of the microstructure of the samples was executed.

1. Shishkovskiy I. V. High definition additive technology fundamentals. Saint Petersburg: Piter, 2016. 400 p.
2. Kokareva V. V., Smelov V. G., Agapovichev A. V., Sotov A. V., Sufiyarov V. S. Development of SLM quality system for gas turbines engines parts production. IOP Conf. Series: Materials Science and Engineering. 2018. Vol. 441. p. 01 2024.
3. Sufiyarov V. Sh., Borisov E. V., Polozov I. А., Masaylo D. V. Control of structure formation in selective laser melting process. Tsvetnye Metally. 2018. No. 7. pp. 68–74.
4. Masaylo D. V., Popovich А. А., Orlov A. V., Gyulikhandanov Е. L. Investigation of structure and mechanical characteristics of specimens made by laser cladding and selective laser melting processes of spheroidized iron based powder. Chernye Metally. 2019. No. 4. pp. 73–77.
5. Brandt M. Laser Additive Manufacturing: Materials, Design, Technologies, and Applications. Editor M. Brandt. Woodhead Publishing, 2016. 498 p.
6. Van Elsen M. Complexity of selective laser melting: a new optimisation approach: Phd dissertation. Heverlee, 2007. 185 p.
7. Jia Q., Gu D. Selective laser melting additive manufacturing of Inconel 718 superalloy parts: Densification, microstructure and properties. Journal of Alloys and Compounds. 2014. Vol. 585. No. 5. pp. 713–721.
8. Krivilev М. D., Kharanzhevskiy Е. V., Gordeev G. А., Ankudinov V. Е. Control of laser sintering of metal powder mixtures. Upravlenie tekhnicheskimi sistemami i tekhnologicheskimi protsessami. 2010. pp. 299–322.
9. Gusarov A. V., Smurov I. Modeling the interaction of laser radiation with powder bed at selective laser melting. Physics Procedia. 2010. Vol. 5. Part B. pp. 381–394.
10. Cloots M., Uggowitzer P. J., Wegener K. Investigations on the microstructure and crack formation of IN738LC samples processed by selective laser melting using Gaussian and doughnut profiles. Materials and Design. 2016. Vol. 89. pp. 770–784.
11. Smelov V. G., Sotov А. V., Agapovichev А. V. Study of structures and mechanical properties of products manufactured via selective laser sintering of 316L steel powder. Chernye Metally. 2016. No. 9. pp. 61–65.
12. GOST 1497–84. Metals. Methods of tension test. Introduced: 01.01.1986.
13. Guraya T., Singamneni S., Chen Z. W. Microstructure formed during selective laser melting of IN738LC in keyhole mode. Journal of Alloys and Compounds. 2019. Vol. 792. No. 5. pp. 151–160.
14. Kunze K., Etter T., Grässlin J., Shklover V. Texture, anisotropy in microstructure and mechanical properties of IN738LC alloy processed by selective laser melting (SLM). Materials Science & Engineering A. 2015. Vol. 620, Iss. 3. pp. 213–222.