Abstract
In this study, a manufacturing strategy, and guidelines for inclined and multilayered structures of variable thickness are presented, which are based on the results of an own-developed geometrical model that obtains both the coating thickness and dilution. This model is developed for the powder-fed directed energy deposition process (DED) and it only uses the DED single-track cladding characteristics (height, width, area, and dilution depth), the overlap percentage, and the laser head tilting-angle as inputs. As outputs, it calculates both the cladding geometry and the dilution area of the coating. This model for the Ni-based alloy 718 was improved, based on previous studies of the single clad working both vertically and at an inclined angle, adding the equations of the single clad characteristics with respect to the main process parameters. The strategy proposed in this paper for multilayered cladding consisted of both adding an extra clad at the edges of the layer and using a variable value of the overlap percentage between clads for geometric adaptations. With this strategy, the material deposition is more accurate than otherwise, and it shows stable growth. Manufacturing a multilayered wall of wider thicknesses at higher heights was utilized to validate the strategy.
| Original language | English |
|---|---|
| Article number | 1280 |
| Pages (from-to) | 1-18 |
| Number of pages | 18 |
| Journal | Metals |
| Volume | 10 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 24 Sept 2020 |
Keywords
- Alloy 718
- Coatings
- Deposition strategy
- Directed energy deposition
- Geometrical model
- Multilayer structure
- Powder
- Variable thickness
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
- This research was funded by the European Commission through the 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), an initiative of the Public-Private Partnership “Photonics and Factories of the Future”. _x000D_This research was also funded by European Institute of Innovation & Technology (EIT) through the project “DEDALUS: Directed Energy Deposition machines with integrated process Algorithms Under dedicated monitoring and control System” (ID 20094) _x000D_and by the vice-counseling of technology, innovation and competitiveness of the Basque Government (Eusko Jaurlaritza) under the ELKARTEK Program, PROCODA and QUALYFAM projects, grant number KK-2019/00004 and KK-2020/00042, respectively.