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About this Abstract
Meeting 2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
Symposium 2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
Presentation Title Beam Focus and Parametric Process Mapping for Diode Laser Additive Manufacturing
Author(s) Ahmet KUS, Zaher Alshehri, Kamran MUMTAZ
On-Site Speaker (Planned) Ahmet KUS
Abstract Scope Diode Area Melting (DAM) is an emerging variant of Laser Powder Bed Fusion (LPBF) that employs a multi-laser array, offering a novel approach to metal additive manufacturing. This study investigates the use of low-wavelength (~450 nm) blue diode lasers in a multi-laser configuration. While conventional parameters such as scanning speed and hatch spacing remain critical, this work highlights the often-overlooked influence of focal length on process performance. The system utilises individual 3.5 W lasers, delivering a combined power of approximately 30 W over a 0.045 mm˛ irradiation area (around 700 W/mm˛). Due to the relatively low power per diode, precise focusing and minimisation of spot size are essential for effective energy delivery. Experimental results on Ti-6Al-4V demonstrate that a slight defocus of 0.1 mm can reduce part density by approximately 3%, underscoring the sensitivity of the process to focal adjustment.
Proceedings Inclusion? Undecided

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