Abstract
Depending on the configuration of the LMD system, the nozzle tilting is necessary to be able to manufacture parts with complex geometry. In these cases, the use of discrete coaxial nozzles is recommended. With this type of nozzle, the powder can clog the internal tips of the nozzle streams due to an inappropriate shape, size distribution, humidity or temperature conditions of the powder particles during the deposition process. This undesired effect can be an opportunity depending on the combination of the activated powder tips for coating complex surfaces when the geometry of the substrate acts as a barrier for the powder stream.
This work presents for first time the effect of the scanning direction and the stream clogging on the deposition process in terms of powder efficiency, Material Deposition Rate (MDR) and clad geometry and dimensions, when Alloy 718 is deposited by LMD using a four-stream discrete coaxial nozzle.
| Original language | English |
|---|---|
| Pages (from-to) | 264-271 |
| Number of pages | 8 |
| Journal | Procedia Manufacturing |
| Volume | 41 |
| DOIs | |
| Publication status | Published - 2019 |
| Event | 8th Manufacturing Engineering Society International Conference, MESIC 2019 - Madrid, Spain Duration: 19 Jun 2019 → 21 Jun 2019 |
Keywords
- Laser metal deposition
- Coatings
- Geometrical characteristics
- Alloy 718
- Discrete nozzle
- Stream clogging
Project and Funding Information
- Project ID
- info:eu-repo/grantAgreement/EC/H2020/723440/EU/A Productive, Affordable and Reliable solution for large scale manufacturing of metallic components by combining laser-based ADDItive and Subtractive processes with high Efficiency/PARADDISE
- Funding Info
- The authors acknowledge the European Commission for support of Project "PARADDISE: a Productive, Affordable and Reliable solution for large scale manufacturing of metallic components by combining laser-based ADDItive and Subtractive processes with high Efficiency” (Grant Agreement 723440), which is an initiative of the Photonics and Factories of the Future Public Private Partnership. The authors also acknowledge the Spanish Ministry of Economy and Competitiveness for support of the project "ADDICLEAN: hybrid technology of eco-efficient manufacturing of pieces of high added value" (RTC-2015-4194-5). Finally, the authors acknowledge the council of technology, innovation and competitiveness of the Basque Country for support of the project “ADDISEND: Scientific cooperation in additive manufacturing for a robust control of the value chain” (2018/00115) within Elkartek 2018.