Thermo-fluid-metallurgical modelling of the selective laser melting process chain

David De Baere*, Mohamad Bayat, Sankhya Mohanty, Jesper Hattel

*Corresponding author for this work

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    Abstract

    The entire process chain of selective laser melting of Ti-6Al-4V is analysed. First, a thermo-fluid dynamical model is used to investigate the temperature profile during the process and estimate the size and shape of the melt pool. The inclusion of the Marangoni effect improves upon previous work by showing the liquid velocity in the melt pool. Next, this information allows us to estimate the morphology of the grains of a part produced by selective laser melting. Finally, a cellular automata is used to model the microstructural evolution during a uniform heat treatment at the beta transus temperature. It is shown that the model shows good agreement with earlier experimental results.

    Original languageEnglish
    JournalProcedia CIRP
    Volume74
    Pages (from-to)87-91
    ISSN2212-8271
    DOIs
    Publication statusPublished - 2018
    Event10th CIRP Conference on Photonic Technologies - Fürth, Germany
    Duration: 3 Sept 20186 Sept 2018
    Conference number: 10

    Conference

    Conference10th CIRP Conference on Photonic Technologies
    Number10
    Country/TerritoryGermany
    CityFürth
    Period03/09/201806/09/2018

    Bibliographical note

    This is an open access article under the CC BY-NC-ND license

    Keywords

    • Selective laser melting
    • Computational fluid dynamics
    • Microstructural modelling
    • Thermal modelling
    • Ti6Al4V

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