Additively Manufactured Lattice Structures
Additively manufactured lattice structures are periodic, porous cellular geometries with high specific stiffness and low mass. They are produced by additive manufacturing processes such as SLS or SLA.
Physicochemical mechanism of action
Additively manufactured lattice structures are created by layer-by-layer material buildup from a digital model. Each layer is individually shaped and fusion-bonded, resulting in a periodic structure.
Metallurgical relevance & risks when welding
These lattice structures are especially prone to welding defects such as porosity and distortion. The porous nature can lead to keyhole formation and uneven cooling, which impairs strength. Additionally, high stresses during welding can lead to cracking.
Shop practice & instructions
Welding additively manufactured lattice structures requires careful preparation. Use high-quality filler material and ensure uniform cooling. High welding current can cause cracking, so adjust settings cautiously. If needed, special processes like TIG welding can be used to ensure an optimal joint.