| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Symposium
|
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Presentation Title |
The Effect of Near-surface Pores on Fatigue Life of Ti-6Al-4V Components |
| Author(s) |
Christine Cummings, Jayme Keist, Edward Reutzel |
| On-Site Speaker (Planned) |
Christine Cummings |
| Abstract Scope |
The assurance that parts will not fail prematurely is one of the largest obstacles to the widespread adoption of additive manufacturing for use in critical applications. Despite finely tuned processing parameters, pores can form stochastically during Laser Powder Bed Fusion (LPBF). A better understanding of the smallest pore that may initiate premature failure informs on the resolution required to ensure that failure-critical pores are identified during inspection. This work investigates the effect of pore size and shape on fatigue life of unHIP’d Ti-6Al-4V specimen manufactured via LPBF. Intentional near-surface pores with varying sizes and aspect ratios were included programmatically in fatigue specimen. The results quantify the effect of pores and begin to determine a maximum allowable pore size. Additionally, within a sub-selection of fatigue specimen, in-situ repair was attempted by increasing the laser power on the layer immediately following the pore. These results indicate how repair may impact fatigue properties. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |