Akademik Veri Yönetim Sistemi
The 34th Annual International Solid Freedom Fabrication Symposium, Texas, Amerika Birleşik Devletleri, 14 - 16 Ağustos 2023, ss.98, (Özet Bildiri)
The traditional Laser Powder Bed Fusion (LPBF) processing methodology relies on a galvo-scanning approach with high-power fiber lasers (1070nm wavelength) to selectively melt thin layers of feedstock from a powder bed. This approach creates challenges with regard to LPBF system scalability, processing efficiency (due to poor laser absorption and wall-plug efficiency) and thermal process control due to rapid melt-pool solidification. Diode Area Melting (DAM) is an alternative approach, integrating multiple individually addressable low-power fiber-coupled diode lasers into a laser head, these traverse across a powder bed to melt powdered feedstock. The highly scalable and compact diode lasers operate at a shorter wavelength (450-808nm) and lower powers (34W) compared to traditional LPBF fiber lasers, enabling a more efficient energy absorption with reduced cooling rates. This work presents DAM processing of Ti64 feedstock with multiple 450nm and 808nm laser sources examining effects on melt pool formation and resultant microstructures.