| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Towards Rapid Qualification
|
| Presentation Title |
On the Fatigue Behavior and Failure Analysis of L-PBF Ti6Al4V Strut-Like Specimens: The Role of the Building Orientation and Mean Stress |
| Author(s) |
Simone Murchio, Anton Du Plessis, Gianluca Zappini, Devid Maniglio, Filippo Berto, Matteo Benedetti |
| On-Site Speaker (Planned) |
Simone Murchio |
| Abstract Scope |
Structural integrity concerns still hinder the widespread use of metal additive manufacturing lattice-based components globally. Their in-service failure is often driven by fatigue, a complex damage mechanism acting at a local scale. Investigating the fatigue behavior of specimens resembling the sub-unital elements of strut-based lattices can be crucial for a better understanding of the overall mechanisms occurring in cellular-based components. This study examines the fatigue properties of L-PBF Ti6Al4V strut-like specimens in their as-built form. Printed at different building orientations, they have been tested under different stress ratios. Haigh diagrams help disclosing the influence of mean stress according to the different printing orientations. Statistical and machine learning approaches assess the role of surface texture and internal defects on the fatigue failure of these specimens. These methodologies might enable a comprehensive understanding of the lattice fatigue behavior and develop reliable lattice-based components for demanding applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Titanium, Mechanical Properties |