| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing:
Incorporating Breakthrough Functionalities for Building Large Scale Components
|
| Presentation Title |
Influencing melt pool dynamics in laser manufacturing with ultrasound |
| Author(s) |
Harry Edward Chapman, Xianqiang Fan, Catherine Tonry, Ivars Krastins, Kai Zhang, Sebastian Marussi, Martyn A. Jones, Chu Lun Alex Leung, Andrew Kao, Peter D. Lee |
| On-Site Speaker (Planned) |
Harry Edward Chapman |
| Abstract Scope |
Laser welding is a key underlying component of additive manufacturing processes but has limitations in aluminium due to its high reflectivity. We hypothesise that applying ultrasound can modify the melt pool surface to increase the welding efficiency, altering the solidification front and producing a refined grain structure. We studied the application of ultrasound to the laser welding process using in-situ synchrotron radiography, and characterised novel mechanisms of interaction of ultrasound on the laser welding process. We investigated the atomisation mechanisms of the melt pool and the corresponding processing failure mechanisms when high-intensity ultrasound is applied. We also conducted ex situ characterisation and coupled these results with the in situ observations to quantify the impact of ultrasound on the grain structure and morphology of the final weld. The applied ultrasound provides a promising functionality in laser welding, and which may be applicable to other laser manufacturing techniques, including additive manufacturing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Joining, Solidification |