Akademik Veri Yönetim Sistemi
Proceeding Book of 6th International Conference on Scientific and Academic Research ICSAR 2025, Konya, Türkiye, 19 - 20 Mart 2025, sa.1, ss.206-217, (Tam Metin Bildiri)
– This study investigates the regulation of the wettability of AISI 316L stainless steel surfaces by fiber laser surface texturing in different atmosphere conditions (air and nitrogen). Two texture patterns—continuous parallel laser tracks (Texture 1) and localized circular textures (Texture 2)—were fabricated with two scale spacings: 300 μm (Scale 1) and 600 μm (Scale 2). Laser treatment was performed with 20 W power, 500 mm/s scan speed, and 200 kHz pulse repetition. Contact angle measurements revealed significant differences in the degree of wettability. The unprocessed reference specimen presented a contact angle of 87.77°. In air, the minimum contact angle of 56.6° was found for Texture 1 with Scale 1 (T1-S1), and the maximum of 82.2° was found for Texture 2 with Scale 1 (T2-S1). Processing in nitrogen gave more hydrophobic surfaces with the maximum contact angle of 90.8° for T2-S1. Optical microscopy revealed that air processing resulted in more oxidation and roughness, but nitrogen processing resulted in well-defined structures with minimal surface degradation. These findingsdemonstrate the potential of fiber laser texturing to modulate the surface wettability of stainless steel, with applications in biomedical implants and fouling-resistant coatings. Future research must study long-term stability and hybrid processing strategies to provide more robustness.