| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Microstructural and Mechanical Long-term Stability of AM Materials
|
| Presentation Title |
Ti-6Al-4V L-PBF Lattices Compression Testing |
| Author(s) |
Shahrooz Nafisi, John Daniel Arputharaj, Reza Ghomashchi |
| On-Site Speaker (Planned) |
Shahrooz Nafisi |
| Abstract Scope |
This study investigates the compression behaviour, microstructural features, and failure modes of Ti-6Al-4V BCC lattice structures fabricated using continuous wave (CW) L-PBF with relative densities ranging between 10% and 77%. The two key factors that are explored include the effect of relative density and the effect of heat treatment. Results indicate that the strength and Young's modulus of the lattice structures increase with higher relative densities and smaller unit cell sizes, although the rate of improvement diminishes as the density approaches that of a solid material. With the heat-treated samples, the prior β-phase boundaries are still retained after heat treatment, which significantly influences the failure modes. A mixed fracture is observed. Fractographic analysis of the as-built CW samples revealed predominantly brittle fracture characteristics in the as-built samples, whereas heat-treated samples exhibit slightly ductile characteristics. Of note heat-treated samples exhibited enhanced plastic deformation, demonstrating increased ductility compared to the as-built samples. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Titanium, Mechanical Properties |