Optimization of manufacturing strategies in Laser Powder Bed Fusion of Ti-6Al-4V for graded gyroid lattices focusing on dimensional accuracy
LANE 2024
15.-19. September
Fürth
2024
Type: Konferenzbeitrag
Abstract
Lattice structures are integral in implant engineering to mimic varying densities and prevent stress shielding. Laser-Based Powder Bed Fusion of Metals enables the production of such intricate parts. Triply periodic minimal surfaces, particularly gyroids, are a major category of lattice. Research is primarily focused on mechanical properties, neglecting the adaptation of manufacturing strategy for graded components. This study employs a design of experiments approach to investigate manufacturing parameters for linearly and non-linearly graded gyroids made of Ti-6Al-4V, emphasizing dimensional accuracy. Two manufacturing strategies were used; the first one applied the best parameters uniformly to the graded parts, while strategy two consists of an optimized stepwise parameter setting. Comparison of results reveals that lower energy input improves dimensional accuracy. The study produced high-dimensional accuracy parts with no significant difference observed in accuracy between strategy one and two (geometrical accuracy of 87.4 \% versus 86.6 \%) when applying it to graded lattices. This highlights the potential of prioritizing other quality aspects like porosity and surface roughness by adjusting manufacturing parameters.