Microstructure and mechanical properties of tial-based alloy produced by selective laser melting

Igor Polozov*, Artem Kantyukov, Vera Popovich, Jia Ning Zhu, Anatoly Popovich

*Corresponding author for this work

    Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

    1 Citation (Scopus)
    60 Downloads (Pure)

    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.

    Original languageEnglish
    Title of host publicationProceedings of the 29th International Conference on Metallurgy and Materials (METAL 2020)
    PublisherTANGER Ltd.
    Pages1037-1041
    ISBN (Electronic)978-80-87294-97-0
    DOIs
    Publication statusPublished - 2020
    Event29th International Conference on Metallurgy and Materials, METAL 2020 - Brno, Czech Republic
    Duration: 20 May 202022 May 2020

    Conference

    Conference29th International Conference on Metallurgy and Materials, METAL 2020
    Country/TerritoryCzech Republic
    CityBrno
    Period20/05/2022/05/20

    Keywords

    • Additive manufacturing
    • Intermetallics
    • Selective laser melting
    • Titanium aluminide

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