Thermal Monitoring for Metallic Additive Manufacturing Multi-Beads Multi-Layers Parts
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GeM - UMR CNRS 6183, Centrale Nantes, France
Additive Manufacturing Group, Joint Laboratory of Marine Technology (JLMT) Centrale Nantes - Naval Group, France
GeM - UMR CNSR 6183, Centrale Nantes, France
Naval Group Research, Technocampus Ocean, France
Submission date: 2021-04-19
Final revision date: 2021-06-18
Acceptance date: 2021-06-18
Online publication date: 2021-07-19
Publication date: 2021-09-30
Corresponding author
Matthieu Rauch   

GeM - UMR CNRS 6183, Centrale Nantes, France
Journal of Machine Engineering 2021;21(3):92-100
Among Metallic Additive Manufacturing processes, Directed Energy Deposition (DED) processes are very promising for the Industry but still need to improve their reliability. Thermal behavior is a critical aspect for which uncontrolled phenomena can lead to part failure. Some thermal monitoring and closed-loop control methods have been developed to observe and regulate the heating of the processed part. However, these methods rely on local measures, thus provide partial information of thermal fields in the whole part volume. This paper proposes a method that combines diverse data to compute online a process indicator that is meaningful for the thermal state of the whole part, and hence for the control of the manufacturing of multi-beads multi-layer parts. A simulation-based model using thermal partial data is proposed. An online monitoring experiment is proposed for validation of the model. Relevance of the control method to ensure mechanical properties of the part is then tested.
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