Cracks formation in nickel-based single crystal alloy manufactured by selective laser melting

Evgenii Borisov*, Kirill Starikov, Anatoly Popovich, Vera Popovich

*Corresponding author for this work

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

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    Abstract

    The aim of this study was to determine the influence of selective laser melting (SLM) process parameters on the formation of cracks in nickel-based single crystal alloy. Several sets of laser scanning parameters, with varied laser power, scanning speed and hatch distance, thus resulting in different volumetric and linear energy densities, were investigated. The relationship between energy density, specimen densification, cracks formation and evolution of directional microstructure was shown. It was found that higher linear energy density results in fewer cracking and defects. Cracking in lower energy samples was attributed to the formation of thermal shrinkage pores in the interdendritic spaces and precipitation of Ta, Mo and Nb carbides along the dendrites boundaries.

    Original languageEnglish
    Title of host publicationProceedings of the 29th International Conference on Metallurgy and Materials, Conference Proceedings (METAL 2020 )
    PublisherTANGER Ltd.
    Pages875-879
    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
    CountryCzech Republic
    CityBrno
    Period20/05/2022/05/20

    Keywords

    • Additive manufacturing
    • Crack formation
    • Ni single crystal alloys
    • Selective laser melting

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