Understanding the structure and dynamics of local powder packing density variations in metal additive manufacturing using set Voronoi analysis Article Swipe
Arden Phua
,
J. R. Smith
,
C.H.J. Davies
,
Peter S. Cook
,
Gary W. Delaney
·
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.1016/j.powtec.2023.118272
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.1016/j.powtec.2023.118272
In powder bed fusion (PBF), the global packing density is an important property used to quantify the bulk behaviour of the powder. However, packing density can be highly non-uniform across the PBF system. In some cases global packing density is even ill-defined, such as in the case of spread powder layers which are typically only 1–2 particles thick and packed across a complex surface. However, an accurate calculation of the local packing density down to the resolution of individual particles can allow us to go beyond bulk descriptions and spatially quantify local powder packing density variations. In this paper, we present Set Voronoi tessellation as a precise method for calculating the local packing fraction of non-spherical particles across arbitrary boundaries. Using the Discrete Element Method (DEM) for a calibrated Ti-6Al-4 V powder model, we study the local packing variation in three critical sections of the PBF system. First, we analyse a discharging Hall flowmeter, a common apparatus used to benchmark the flowability of PBF feedstock. Second, we analyse the powder spreading process to understand how particle densities and velocities influence deposition. Lastly, we analyse the local packing variation across a realistic AM powder layer to demonstrate how layers can be digitally qualified to inform subsequent laser melting. Our work provides a novel technique to study the variations in the local packing structure of powders in dynamic PBF systems and to understand the mechanisms through which key process parameters influence final part quality.
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- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1016/j.powtec.2023.118272
- OA Status
- hybrid
- Cited By
- 7
- References
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All OpenAlex metadata
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https://openalex.org/W4318826695Canonical identifier for this work in OpenAlex
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https://doi.org/10.1016/j.powtec.2023.118272Digital Object Identifier
- Title
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Understanding the structure and dynamics of local powder packing density variations in metal additive manufacturing using set Voronoi analysisWork title
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2023Year of publication
- Publication date
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2023-02-01Full publication date if available
- Authors
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Arden Phua, J. R. Smith, C.H.J. Davies, Peter S. Cook, Gary W. DelaneyList of authors in order
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https://doi.org/10.1016/j.powtec.2023.118272Publisher landing page
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YesWhether a free full text is available
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hybridOpen access status per OpenAlex
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https://doi.org/10.1016/j.powtec.2023.118272Direct OA link when available
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Voronoi diagram, Atomic packing factor, Sphere packing, Materials science, Discrete element method, Geometry, Biological system, Mechanics, Crystallography, Composite material, Mathematics, Physics, Chemistry, BiologyTop concepts (fields/topics) attached by OpenAlex
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7Total citation count in OpenAlex
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2025: 3, 2024: 2, 2023: 2Per-year citation counts (last 5 years)
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10Other works algorithmically related by OpenAlex
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