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<p>With the growing demand for lightweight and high-performance materials in aerospace and biomedical applications, architectured metals—particularly lattice structures—have emerged as promising candidates to break traditional strength–density trade-offs. In this context, we investigate the mechanical behavior of Ti-6Al-4V lattice structures fabricated via laser powder bed fusion, emphasizing their topological and microstructural characteristics. By reducing the relative density to approximately one-third of the solid counterpart, the porous architectures exhibit a yield strength of ~ 60&#xa0;MPa, while maintaining the alloy’s inherent corrosion resistance and biocompatibility. A comprehensive multiscale analysis—combining geometric topology and sub-grain morphology—reveals how lattice design enables tunable strength-to-weight ratios and flexible mechanical combinations. The findings provide quantitative insight into the interplay between lattice topology, microstructure, and mechanical performance, offering a promising design space for lightweight and functional Ti-based engineering components.</p>

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Ti-6Al-4V Diamond Lattice Materials by Laser Powder Bed Fusion: Mechanics, Topologies and Microstructures

  • 期刊论文

  • 发表日期：

    2025年6月9日

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  • Yanqin Zhang,
  • Yu Jin,
  • Guowei Zhao,
  • Wei Li

摘要

With the growing demand for lightweight and high-performance materials in aerospace and biomedical applications, architectured metals—particularly lattice structures—have emerged as promising candidates to break traditional strength–density trade-offs. In this context, we investigate the mechanical behavior of Ti-6Al-4V lattice structures fabricated via laser powder bed fusion, emphasizing their topological and microstructural characteristics. By reducing the relative density to approximately one-third of the solid counterpart, the porous architectures exhibit a yield strength of ~ 60 MPa, while maintaining the alloy’s inherent corrosion resistance and biocompatibility. A comprehensive multiscale analysis—combining geometric topology and sub-grain morphology—reveals how lattice design enables tunable strength-to-weight ratios and flexible mechanical combinations. The findings provide quantitative insight into the interplay between lattice topology, microstructure, and mechanical performance, offering a promising design space for lightweight and functional Ti-based engineering components.