| Abstract Scope |
Triple Periodic Minimal Surface (TPMS) structures, defined by continuous, mathematically derived geometries, offer exceptional strength-to-weight and surface-area-to-volume ratios, along with excellent energy absorption, making them ideal for lightweight, mechanically efficient, and thermally optimized applications. However, their geometric complexity presents significant challenges for conventional manufacturing techniques.
This study explores the fabrication of TPMS lattices using 17-4 PH stainless steel via Metal Fused Filament Fabrication (FFF) - a low-cost, accessible additive manufacturing process that extrudes metal-filled filaments, followed by debinding and sintering to produce fully metallic parts. Gyroid and diamond lattices with varying volume fractions (porosities of 45–75%) and unit cell sizes (0.6-0.8 mm ) were fabricated. Their forming quality, mechanical behavior, and heat transfer performance were systematically evaluated through finite element simulations and experimental characterization. The results establish key design–processing–performance relationships, providing a foundation for structural optimization and expanding the applicability of metal TPMS architectures in advanced engineering systems. |