The specific strength of lightweight lattice structures built with SLM is of interest to the aerospace industry. Honeycombs were manufactured with increasing wall thicknesses (which increases density) and tested under compression. The optimal strength to density ratio was determined from the resulting data. The build quality was also evaluated to determine how/if the results were influenced by the specimen quality. Differences between the nominal and as-built geometry were identified, but considered to be minimal. Microstructural evaluation of the specimens revealed a possible dependence on the ‘border scan’ properties, as the thickness of the specimens was such that the board scan made up most of the part. This work was used to validate the results of a finite element analysis of this geometry.
M. Spratt et al., "Effect of Wall Thickness and Build Quality on the Compressive Properties of 304L Thin-Walled Structures Fabricated by SLM," Proceedings of the 29th Annual International Solid Freeform Fabrication Symposium (2018, Dallas, TX), pp. 708-715, University of Texas at Austin, Aug 2018.
29th Annual International Solid Freeform Fabrication Symposium -- An Additive Manufacturing Conference (2018: Aug. 13-15, Austin, TX)
Materials Science and Engineering
Mechanical and Aerospace Engineering
Intelligent Systems Center
Keywords and Phrases
Steel; SLM; Lattice
Article - Conference proceedings
15 Aug 2018