|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Additive Manufacturing and Innovative Powder/Wire Processing of Multifunctional Materials
||Hollow-Strut Metal Lattices by Laser Powder Bed Fusion
||Jordan Noronha, Ma Qian, Martin Leary, Milan Brandt, Elizabeth Kyriakou
|On-Site Speaker (Planned)
A combination of civil and mechanical engineering, hollow-strut lattices are an emerging subset of periodic cellular materials achieving high mechanical efficiency. The conventional method of hollow-strut lattice manufacture is inefficient, however, with long lead times, an exhaustive combination of fabrication processes, and geometrical constraints that restrict access from the broader research community. Laser powder bed fusion (LPBF) offers an alternative, improving manufacturability of these structures with greater geometrical control, efficient lead times, and enabling the fabrication of higher density lattices. The mechanical performance of LPBF-manufactured Ti6Al4V and AlSi10Mg hollow-strut lattices observe yield strengths of up to 53MPa for a given relative density of 15.6%, surpassing the majority of conventional solid-strut lattices. However, these structures were observed to be weakened due to premature node buckling. By exploiting the internal channels to reinforce the nodes, enhanced strengths are achievable. This research enables lattices with high-strength functionality to expand design flexibility and applications.
||Additive Manufacturing, Titanium, Mechanical Properties