Akademik Veri Yönetim Sistemi
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, cilt.136, sa.10, ss.4471-4490, 2025 (SCI-Expanded)
This study investigates the use of Diode Area Melting (DAM) to process 316L stainless steel (SS316L), an alternative to Laser Powder Bed Fusion (LPBF), utilising independently addressable, low-power (similar to 3.5 W) 450 nm blue lasers to address key limitations of LPBF, including thermal control, scalability, and efficiency. A normalised energy density (NED) processing map was developed to ensure successful material melting. Results demonstrated that DAM can achieve a relative density of 99.99% in single-layer SS316L samples using multiple 450 nm blue diode lasers. Notably, DAM-processed SS316L exhibited a significantly higher delta-ferrite content than samples produced via traditional LPBF, which is attributed to the slower cooling rate in DAM (600 degrees C/s vs. 10(7) degrees C/s). This increased delta-ferrite content enhances resistance to stress corrosion cracking in austenitic steel welds. Moreover, sub-grain cellular structures in the DAM-processed SS316L showed a 100% increase in size (4 mu m) compared to those produced by LPBF.