Optimization of printing parameters and out-of-plane compression performance of 316L stainless steel ribbed honeycomb.

The design and exploration of novel structures in engineering, where unique structures can produce significant improvements in performance, has always been an important multidisciplinary research area. Unlike traditional manufacturing, the unique manufacturing concept of additive manufacturing (AM) enables the construction of complex structures with ease. Therefore, the exploration of novel structures by means of additive manufacturing has become a hot point of research in this field, taking full use of the advantages of AM. In this paper, we design a ribbed honeycomb structure based on the bionic principle and construct and study it by selective laser melting (SLM). The hardness, relative density, and structure are characterized at different combinations of scanning speed and laser power, and the best structure and properties are found at 1200 mm/s and 400 W. On the basis of these printing parameters, several groups of specimens with different structures were constructed again to investigate the deformation process and mechanical properties during the out-of-plane compression. It was found that the platform stress of the honeycomb could be increased by up to 19.0% after the addition of ribs, and the honeycomb with 10° rib inclination showed a rib-dominated deformation mode during the deformation process, in which the compression curve showed extremely regular and periodic fluctuations with a large range. [ABSTRACT FROM AUTHOR]