About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Surface Engineering IX
|
| Presentation Title |
Recent Progress in Process Control via Multibeam Laser Directed Energy Deposition for Metallic Coating: Thermal Management and Interface Reactions |
| Author(s) |
Takahiro Kunimine, Kholqillah Ardhian Ilman, Yorihiro Yamashita |
| On-Site Speaker (Planned) |
Takahiro Kunimine |
| Abstract Scope |
Managing the thermal cycle in conventional single-beam laser directed energy deposition (DED) presents significant hurdles; steep temperature gradients and rapid solidification often trigger gas porosity and uncontrolled interface dilution. This study reports an approach using multibeam laser DED combined with auxiliary substrate heating to precisely control meltpool dynamics, mitigate defects, and optimize interface reactions in metallic coatings. We systematically investigate the effects of spatial multibeam laser configurations and preheating temperatures on cooling rates, transient meltpool behavior, and subsequent microstructural features. Experimental results reveal that tailored thermal management successfully suppresses gas porosity in the deposited tracks. Furthermore, precise temperature control prevents excessive substrate dilution and inhibits the formation of brittle intermetallic phases, securing strong metallurgical bonding while preserving the coating's intended chemistry. These insights provide a comprehensive and practical strategy for designing high-quality metallic coatings with minimized defects using next-generation multibeam laser DED systems. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Surface Modification and Coatings, Powder Materials, Process Technology |