# Compressive Behavior of Inconel 625 and Ti-6 Al-4V Strut Lattices Fabricated by LPBF
###### Abstract
[PERSON]'s review [13] illustrates the potential of AM lattice structures in tissue engineering applications. The review emphasizes the ability of AM to significantly improve the approaches for tissue regeneration and biomedical implant manufacturing. The suitability of additively manufactured lattice structures as replacements for cancellous bone in orthopedic implants has been explored by other researchers, who have shown that these structures can match the elastic modulus of cancellous bone in both tension and compression [14]. The aerospace industry is another field directly interested in the development of lattice structures, as an efficient way to reduce the total mass of structures to maximize the payload, because operational costs are very high. In addition, the construction of these structures through AM technology can reduce energy consumption and material waste during the manufacturing process [15]. Lattice structures are considered a solution to improve the performances of different propulsion system components, including gas turbine engines and rocket engines. Researchers are currently studying the possibilities of design for additive manufacturing (DfAM) components that integrate lattices. [PERSON] et al. [16] studied the implementation of octet truss lattice structures in gas turbine blades to achieve weight reduction and improved vibration damping, thereby increasing efficiency and load-bearing capacity. They concluded that the vanes integrating lattices have excellent vibration characteristics and present low stresses, making it possible to use them as a solution to improve the efficiency and durability of gas turbine engines. [PERSON] et al. [17] studied the integration of lightweight lattice structures into gas turbine engine fan blades. The tomographic analysis confirmed the accuracy of additively manufactured blades relative to 3D CAD models. The authors recommended that, during the structural design process, lattice structures should be strategically placed in low-stress regions and areas subjected to compressive loading. [PERSON] et al. [18] studied the integration of lattice structures into a compressor impeller to make its rigidity and strength adjustable and to reduce its mass on the premise of meeting the design requirements. Unfilled, solid, and lattice-filled impeller designs with varying diameters were analyzed and compared under a maximum rotational speed of 80,000 rot./min. The results show that the impeller-integrating lattices can not only effectively reduce the weight, but also improve the compressor efficiency. Lattice structures were integrated into a monolithic micro-gas turbine additive manufactured by a consortium consisting of PTC Company, the Technion-Israel Institute of Technology, the von Karman Institute for Fluid Dynamics, and Izmir Katip Celebi University [19]. In addition to the use in gas turbine components, the lattice structures have been studied for integration in heat exchangers [20; 21; 22]. Before integrating lattice structures into viable components, several studies should be conducted at the laboratory level via numerical simulation and experimental testing to assess their properties. Many studies have been published regarding the mechanical properties of lattice structures determined by experimental and numerical approaches [11; 23; 24; 25; 26; 27; 28; 29; 30]. Even so, the need for a comprehensive database containing information regarding different lattice configurations manufactured from multiple materials is still needed because little is known about the effect of the unit cell topology on the lattice structure mechanical performance, as was highlighted by [PERSON] et al. [31] and [PERSON] et al. [11] in their reviews. Fundamental knowledge regarding the behavior of lattice structures under mechanical loads can be found in the review by [PERSON] et al. [32] and in the study by [PERSON] et al. [33].