Abstract
Laser-wire based Directed Energy Deposition (DED) processes are being developed at Oak Ridge National Laboratory’s Manufacturing Demonstration Facility, in collaboration with GKN Aerospace, for large volume metal additive manufacturing of metallic structures. The technology has the potential to deliver reduced costs and lead times when compared to conventional methods of manufacturing in several industries. While complex structures are being produced with relatively high deposition rates and at near-net shape, issues persist with achieving consistent geometric accuracy and thermal stability. A significant research effort is focused on developing coordinated, multi-modal sensing and control for addressing these issues. An introduction to this large-volume metal process will be provided, followed by investigations into real-time thermal monitoring capabilities that support control and data analytics frameworks. Studies focused on melt pool monitoring via infrared thermography, thermal and geometric effects on melt pool size measurement, and interactions between process variables and thermal monitoring metrics are presented.
Original language | English |
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Pages | 1411-1429 |
Number of pages | 19 |
State | Published - 2019 |
Event | 30th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2019 - Austin, United States Duration: Aug 12 2019 → Aug 14 2019 |
Conference
Conference | 30th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2019 |
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Country/Territory | United States |
City | Austin |
Period | 08/12/19 → 08/14/19 |
Funding
This research was funded by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office in partnership with GKN Aerospace. The authors gratefully acknowledge the extended Oak Ridge National Laboratory and GKN Aerospace teams that contributed to this work, including John Potter, Ronnie Wilson, and Chris Allison of GKN, as well as Abigail Barnes and Katherine Gaul of ORNL for manuscript review and editing. The authors also acknowledge Steffen Bonss of Laserline and Sandro Mehner of Fraunhofer USA for their advice and technical assistance.
Funders | Funder number |
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U.S. Department of Energy | |
Advanced Manufacturing Office | |
Office of Energy Efficiency and Renewable Energy |