Abstract
One of the major challenges faced by laser-based Directed Energy Deposition (DED) is the process efficiency. This efficiency is significantly affected by the percentage of blown powder that effectively reaches the spherical metal melt pool. Increasing the powder efficiency would allow to reduce the overall costs of the DED process and consequently reduce the printed part cost. The present work focuses on the experimental characterization of the powder-gas jet in terms of powder stream shape, stand-off distance and powder-jet focus diameter by using 3 different high speed image-based approaches. The powder jet parameters are linked to the blown powder settings (carrier gas, shielding gas, powder feed rate, particle diameter) and optimized to minimize the powder waste. The different approaches give equivalent results and the reduction of the particle diameter turns out to be the most relevant parameter to decrease the powder-jet focus diameter and therefore increase the powder efficiency.
| Original language | English |
|---|---|
| Title of host publication | 11th CIRP Conference on Photonic Technologies [LANE 2020] |
| Place of Publication | Erlangen (DE) |
| Publisher | Elsevier BV |
| Pages | 281-287 |
| Number of pages | 8 |
| Volume | 94 |
| DOIs | |
| Publication status | Published - 15 Sept 2020 |
| Event | LANE 2020: 11th CIRP Conference on Photonic Technologies - Virtual edition, Erlangen, Germany Duration: 7 Sept 2020 → 10 Oct 2020 https://www.lane-conference.org/ |
Publication series
| Name | Procedia CIRP |
|---|---|
| Publisher | Elsevier |
| ISSN (Print) | 2212-8271 |
Conference
| Conference | LANE 2020 |
|---|---|
| Country/Territory | Germany |
| City | Erlangen |
| Period | 7/09/20 → 10/10/20 |
| Internet address |
Bibliographical note
Publisher Copyright:© 2020 The Authors. Published by Elsevier B.V.
Copyright:
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