Print Email Facebook Twitter Microstructure and mechanical properties of tial-based alloy produced by selective laser melting Title Microstructure and mechanical properties of tial-based alloy produced by selective laser melting Author Polozov, Igor (St. Petersburg Polytechnic University) Kantyukov, Artem (St. Petersburg Polytechnic University) Popovich, V. (TU Delft (OLD) MSE-5) Zhu, Jia Ning (St. Petersburg Polytechnic University) Popovich, Anatoly (St. Petersburg Polytechnic University) Date 2020 Abstract Additive Manufacturing (AM) is an attractive way of producing parts of intermetallic titanium alloys. However, high brittleness of these alloys makes it challenging to produce crack-free intermetallic parts by AM. One way to overcome this problem is to use high-temperature powder-bed preheating. In this paper, Ti-48Al-2Cr-2Nb alloy was obtained by selective laser melting process with high-temperature preheating of 800-900 ºC. Crack-free specimens with a relative density of 99.9% were fabricated using an optimized process parameter set. Microstructure and phase composition were studied using scanning electron microscopy and X-Ray diffraction to reveal a fine microstructure consisting of lamellar a2/? colonies, equiaxed ? grains, and retained ß phase. Compressive tests and microhardness measurements showed that the produced alloy exhibited superior properties compared to the conventionally obtained TiAl-alloy. Subject Additive manufacturingIntermetallicsSelective laser meltingTitanium aluminide To reference this document use: http://resolver.tudelft.nl/uuid:866120d0-d7e2-4d5a-afa8-1d8bbce220b2 DOI https://doi.org/10.37904/metal.2020.3604 Publisher TANGER Ltd. ISBN 978-80-87294-97-0 Source Proceedings of the 29th International Conference on Metallurgy and Materials (METAL 2020) Event 29th International Conference on Metallurgy and Materials, METAL 2020, 2020-05-20 → 2020-05-22, Brno, Czech Republic Part of collection Institutional Repository Document type conference paper Rights © 2020 Igor Polozov, Artem Kantyukov, V. Popovich, Jia Ning Zhu, Anatoly Popovich Files PDF metal2020_polozov_metal.pdf 557.63 KB Close viewer /islandora/object/uuid:866120d0-d7e2-4d5a-afa8-1d8bbce220b2/datastream/OBJ/view