Akademik Veri Yönetim Sistemi
The 35th Annual International Solid Freedom Fabrication Symposium, Texas, Amerika Birleşik Devletleri, 10 - 13 Ağustos 2024, ss.1329-1342, (Tam Metin Bildiri)
Diode Area Melting (DAM) is a novel additive manufacturing technology that contains low optical power (~3.5W) output and lower wavelength (450 nm) lasers compared to traditional laser powder bed fusion (LPBF) with 1064 nm. DAM enables the processing of materials with independently addressable 450 nm blue diode lasers, which are integrated into a multi-laser head. The multi-laser head incorporates focusing and collimating lenses, which facilitate the achievement of localized melting via the connection of multiple 450 nm blue diode lasers with their fibercoupled output to the head assembly. The use of a shorter wavelength laser in the processing of metal powders using a DAM system has been demonstrated to enhance the power absorptivity of the metals in question previously. DAM has already been utilized to process Ti-6Al-4V through the integration of 450 nm and 808 nm diode lasers. The objective of this study is to demonstrate the production capability of stainless steel 316L (SS316L) using DAM. In this study, a range of scanning speeds (50 to 500 mm/min) and hatch distances (0.2, 0.3, and 0.4 mm) were selected as process parameters to identify the optimal process parameter window for the fabrication of singlelayer SS316L structures in terms of melt pool characterization and surface roughness measurements. The findings indicated that the surface roughness of samples with a 0.2 mm hatch distance was observed to be lower in comparison to other samples at each scanning speed. Furthermore, the surface roughness of samples lower than 15 µm ranged between 25.6-126 𝐽/𝑚𝑚2 even 3.469 µm for 126 𝐽/𝑚𝑚2.