[SAMPLE] Enhancing the Mechanical Performance of Additively Manufactured Ti-6Al-4V Lattices

A Data-Driven Study on Process Parameters and Microstructure

Abstract

This is a sample article created to preview the IJMIE article page layout; it contains no real research data and can be safely deleted before launch.

Additively manufactured titanium alloy (Ti-6Al-4V) lattice structures offer exceptional specific strength for aerospace and biomedical applications, yet their mechanical performance is highly sensitive to laser powder-bed fusion process parameters. In this study we systematically vary laser power, scan speed and hatch spacing to map their influence on relative density, microstructure and quasi-static compressive response. Using a design-of-experiments approach combined with machine-learning surrogate models, we identify a processing window that increases yield strength by up to 18% while maintaining a relative density above 99.2%. Electron backscatter diffraction reveals a transition from columnar prior-β grains to a refined basketweave α′ martensite that correlates strongly with the improved strength. The results demonstrate that data-driven process optimisation can reliably tailor the strength-to-weight ratio of metal lattices, and provide design guidelines transferable to other alloy systems.