Build parameter influence on strut thickness and mechanical performance in additively manufactured titanium lattice...

Prior research has shown that build parameters significantly affect the properties of solid additively manufactured components. However, the influence of these parameters on lattice structures remains less understood. While some studies have explored the mechanical behavior of lattices, few have focused on how specific build settings impact their performance. This gap motivated the need to investigate the relationship between fabrication parameters and mechanical outcomes in titanium lattices. The lack of data on how laser power, scan speed, and offset affect strut geometry and strength limits the ability to optimize lattice designs. Understanding these effects is essential for tailoring lattices to meet application-specific requirements. Current knowledge suggests that lattice performance is sensitive to manufacturing conditions. This paper contributes by providing empirical data on how varying build parameters alters the mechanical and geometric properties of titanium lattices.

The primary goal of this research was to assess how build parameters influence the static compressive mechanical performance of titanium lattice structures. A secondary objective was to determine how these parameters affect the actual strut dimensions of the lattices. The study aimed to compare the mechanical behavior of both regular and stochastic lattice designs under different fabrication conditions. By systematically varying laser power, scan speed, and laser offset, the researchers sought to identify which parameters had the most significant impact on performance. The investigation also aimed to evaluate whether standard OEM parameters for solid structures are suitable for lattice geometries. The researchers wanted to establish whether optimizing build settings for lattices could lead to better mechanical outcomes. This work is motivated by the need to improve the reliability and performance of additively manufactured lattices in engineering applications. The findings could help guide the development of more effective fabrication strategies for lattice-based components.

The study used laser powder bed fusion to fabricate both regular and stochastic titanium lattices with designed strut diameters of 200 or 300 micrometers. A controlled range of laser power (140-180 W), scan speed (1700-2100 mm/s), and laser offset (0-45 micrometers) was applied to each lattice type. Compression testing was conducted according to the ISO 13314 (2011) standard to evaluate modulus, yield strength, and ultimate compressive strength. The researchers measured internal strut diameters to assess how build parameters affected geometry. Data were collected from multiple lattice samples under varying fabrication conditions. The mechanical performance metrics were compared across different parameter settings. The study focused on identifying the most influential build parameters for mechanical and geometric outcomes. The results were analyzed to determine the relationship between process variables and lattice behavior.

Laser power adjustments had the most significant impact on mechanical performance, with a 50 W change leading to approximately a 2X increase in maximum load and modulus for both lattice types. Regular lattices showed higher mechanical response compared to stochastic lattices during the evaluation. Internal strut diameters varied with changes in build parameters, particularly with laser offset adjustments. The study found that laser offset produced the most noticeable changes in strut geometry between lattice samples. The results indicate that increasing laser power improves the mechanical properties of titanium lattices. The data suggest that scan speed and laser offset also influence strut dimensions but to a lesser extent than laser power. The findings support the need to optimize build parameters specifically for lattice structures rather than relying on OEM settings for solid components. The results highlight the importance of tailoring fabrication conditions to achieve desired mechanical and geometric characteristics in lattices.

The authors propose that build parameter optimization is necessary to achieve optimal mechanical performance in additively manufactured titanium lattices. The study suggests that standard OEM parameters, developed for solid structures, may not be suitable for lattice geometries. The findings indicate that laser power is the most influential parameter affecting mechanical performance. The researchers observed that regular lattices outperformed stochastic lattices in terms of mechanical response. The study suggests that laser offset significantly affects strut geometry, which in turn influences mechanical behavior. The data support the idea that varying scan speed and laser power can lead to different mechanical outcomes. The authors propose that adjusting build parameters can help tailor lattice properties for specific applications. These conclusions are based on the observed relationships between process variables and mechanical performance in the tested lattices.