| About this Abstract |
| Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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| Symposium
|
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Presentation Title |
Melt Track Formation Process with a Constant Linear Energy Density in Laser Powder Bed Fusion Revealed by In-situ X-Ray Imaging and Temperature Measurement |
| Author(s) |
Yuki Wakai, Naoki Seto, Naoko Sato, Yuta Kushiya, Shinsuke Suzuki |
| On-Site Speaker (Planned) |
Yuki Wakai |
| Abstract Scope |
An understanding of a melting process during laser powder bed fusion is crucial for fabricating parts without support structures. However, the melting process in the powder bed remains unclear. This study aims to investigate the effects of laser parameters on a melt track formation in the powder bed via real-time monitoring methods. A 10 mm depth layer of pure Ti powder was irradiated by a laser under different laser power and scanning velocity with a constant linear energy density (10 J/mm). The X-ray imaging revealed that the spherical melt pool, which was formed under the laser irradiation point, moved in the opposite direction to the laser scan
under all laser conditions. However, the melt track shape tended to become discontinuous with increasing laser power and scanning velocity. The results obtained by the two-color pyrometer suggest that the discontinuous melt track was caused by spattering due to a rapidly temperature rise. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |