An extended laser beam heating model for a numerical platform to simulate multi-material selective laser melting

Svyetlichnyy Dmytro, Bajda Szymon, Krzyzanowski Michal*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    Abstract

    A laser beam heating model (LBHM) is an important part of a platform for numerical modelling of a multimaterial selective laser melting process. The LBHM is utilised as a ray-tracing algorithm that is widely applied for rendering in different applications, mainly for visualisation and very recently for laser heating models in selective laser melting. The model presented in this paper was further extended to transparent and translucent materials, including materials where transparency is dependent on the material temperature. In addition to reflection and surface absorption, commonly considered in such models, phenomena such as refraction, scattering, and volume absorption were also implemented. Considering associated energy transfer, the model represents a laser beam as a stream of moving particles, i.e., photons of the same energy. When the photons meet a boundary between materials, they are reflected, absorbed, or transmitted according to geometric and thermal interfacial characteristics. This paper describes the LBHM in detail, its verification and validation, and also presents several simulation examples of the entire selective laser melting process with implemented LBHM.
    Original languageEnglish
    Article numberdoi.org/10.1007/s00170-023-12138-x
    Pages (from-to)3451-3470
    Number of pages20
    JournalInternational Journal of Advanced Manufacturing Technology
    Volume128
    Issue number7-8
    DOIs
    Publication statusPublished (VoR) - 21 Aug 2023

    Keywords

    • Laser beam heating model
    • lattice-Boltzmann method
    • Ray-tracing algorithm
    • Selective laser melting

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