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<p>This research introduces a comparison study on the mechanical behaviour of SS316L parts made using additive manufacturing, specifically in three different designs: plain solid, gyroid lattice, and heat-treated gyroid lattice. The parts were made using Laser Powder Bed Fusion (LPBF) and designed with tools like SolidWorks and nTopology, following ASTM standards for tensile and impact testing. The plain solid design had the highest strength, with ultimate tensile strength of 609&#xa0;MPa, yield strength of 493&#xa0;MPa, and elongation of 41%, along with good impact resistance of 92&#xa0;J. The gyroid lattice design, on the other hand, had lower strength (UTS of 202.46&#xa0;MPa) and impact resistance (26&#xa0;J), but was much lighter, with a density of 7.49&#xa0;g/cc, making it a good option for use in medical implants where weight is a concern. After applying heat treatment, the gyroid structure showed improved mechanical properties, with an increased UTS of 236. 1&#xa0;MPa and elongation of 38%, without adding extra weight. This study shows how combining biomimetic lattice structures with heat treatment can lead to better implant designs that are both strong and lightweight. The findings suggest that additive manufacturing can create implants that are more efficient in terms of weight and performance, offering a new way to develop customized and effective medical devices. This study highlights the influence of lattice design and post processing on mechanical behaviour of fabricated structures. The results provide insight into the structure property relationship of gyroid lattice configurations under heat treatment.</p> Graphical Abstract <p></p>

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Design and mechanical evaluation of solid and gyroid lattice SS316L structures fabricated via laser powder bed fusion

  • 期刊论文

  • 发表日期：

    2026年5月30日

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  • P Dinesh Kumar,
  • S. Kavitha,
  • M Adam Khan,
  • JT Winowlin Jappes,
  • Rijo Jacob Thomas

摘要

This research introduces a comparison study on the mechanical behaviour of SS316L parts made using additive manufacturing, specifically in three different designs: plain solid, gyroid lattice, and heat-treated gyroid lattice. The parts were made using Laser Powder Bed Fusion (LPBF) and designed with tools like SolidWorks and nTopology, following ASTM standards for tensile and impact testing. The plain solid design had the highest strength, with ultimate tensile strength of 609 MPa, yield strength of 493 MPa, and elongation of 41%, along with good impact resistance of 92 J. The gyroid lattice design, on the other hand, had lower strength (UTS of 202.46 MPa) and impact resistance (26 J), but was much lighter, with a density of 7.49 g/cc, making it a good option for use in medical implants where weight is a concern. After applying heat treatment, the gyroid structure showed improved mechanical properties, with an increased UTS of 236. 1 MPa and elongation of 38%, without adding extra weight. This study shows how combining biomimetic lattice structures with heat treatment can lead to better implant designs that are both strong and lightweight. The findings suggest that additive manufacturing can create implants that are more efficient in terms of weight and performance, offering a new way to develop customized and effective medical devices. This study highlights the influence of lattice design and post processing on mechanical behaviour of fabricated structures. The results provide insight into the structure property relationship of gyroid lattice configurations under heat treatment.

Graphical Abstract