| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Towards Rapid Qualification
|
| Presentation Title |
Effect of Build Orientation and Stress Ratio on the Fatigue Crack Growth Behavior of Laser Powder Bed Fused Ti-6Al-4V |
| Author(s) |
Mikyle Paul, Sajith Soman, Shuai Shao, Nima Shamsaei |
| On-Site Speaker (Planned) |
Sajith Soman |
| Abstract Scope |
While additive manufacturing enables the production of parts with complex geometry, the fabrication process can introduce directional micro-/defect-structure within materials, resulting in anisotropy in their mechanical response. This study investigated the fatigue crack growth behavior of laser powder bed fused Ti-6Al-4V as affected by build orientation and stress ratio. Compact tension specimens fabricated in three different build orientations, i.e., vertical, horizontal, and diagonal, were tested under three different stress ratios. The influence of build orientation and stress ratio on the near-threshold crack growth and Paris regimes were specifically studied. Results revealed that the dependence of crack growth rates on build orientation was reduced in the threshold region as the stress ratio was increased. With the crack growth data, fatigue lives of axial fatigue specimens of varying defect characteristics and build orientations were predicted using linear elastic finite element-based crack growth simulations and validated against experiments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Titanium, Mechanical Properties |