| Naslov: | Influence of particle size on powder velocity distribution at the nozzle outlet in Directed Energy Deposition |
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| Avtorji: | ID Mede, Tijan (Avtor)
ID Jeromen, Andrej (Avtor)
ID Govekar, Edvard (Avtor)
ID Mallon, Michael (Avtor)
ID Godec, Matjaž (Avtor) |
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| Datoteke: |  PDF - Predstavitvena datoteka, prenos (3,42 MB)
MD5: 8BC29BC8BA3B4F75CD96A50C19486245
 URL - Izvorni URL, za dostop obiščite https://www.sciencedirect.com/science/article/pii/S0264127525011001
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| Jezik: | Angleški jezik |
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| Tipologija: | 1.01 - Izvirni znanstveni članek |
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| Organizacija: |  IMT - Inštitut za kovinske materiale in tehnologije
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| Povzetek: | Metal-based Directed Energy Deposition (DED) is considered one of the variations of additive manufacturing with the highest potential, particularly for space industry and in-orbital manufacturing. The technology however still faces various challenges, many of which can be traced back to poor control and understanding of the powder delivery. Velocity distribution of powder particles at the DED nozzle outlet has a key influence on the results of any predictive model of powder stream and yet remains largely disputed. Certain numerical studies highlighted a possible influence of powder particle size on the velocity condition at the nozzle exit, yet no experimental studies confirmed this effect. The experimental campaign described in this paper quantifies this relation between powder particle size and velocity distribution at the nozzle outlet and a strong decrease of particle speed with particle size is observed. Moreover, smaller particles are observed to travel at speeds higher than the mean carrier gas speed suggesting powder particle segregation within the nozzle as one of the mechanisms driving speed differences at the nozzle outlet. |
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| Ključne besede: | directed energy deposition, powder stream, boundary conditions, particle velocity distribution |
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| Status publikacije: | Objavljeno |
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| Verzija publikacije: | Objavljena publikacija |
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| Datum objave: | 10.09.2025 |
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| Založnik: | Elsevier |
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| Leto izida: | 2025 |
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| Št. strani: | str. 1-10 |
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| Številčenje: | Vol. 259, [article no.] 114680 |
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| Izvor: | Materials & Design |
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| PID: | 20.500.12556/DiRROS-23647  |
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| UDK: | 621.791.72 |
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| ISSN pri članku: | 0264-1275 |
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| DOI: | 10.1016/j.matdes.2025.114680 |
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| COBISS.SI-ID: | 230759683 |
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| Avtorske pravice: | © 2025 The Author(s) |
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| Opomba: | Soavtorji: Andrej Jeromen, Edvard Govekar, Michael Mallon, Matjaž Godec;
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| Datum objave v DiRROS: | 19.09.2025 |
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| Število ogledov: | 292 |
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| Število prenosov: | 140 |
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| Metapodatki: |    |
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