About this Abstract |
Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
Symposium
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2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
Presentation Title |
Improving Fatigue Performance of PBF Metals using Self-terminating Etching Processes |
Author(s) |
Subbarao Raikar, Steven DiGregorio, Owen Hildreth |
On-Site Speaker (Planned) |
Owen Hildreth |
Abstract Scope |
The poor surface finish of Ti-6Al-4V (Ti64) and GRCop42 parts fabricated from Powder Bed Fusion has detrimental effects on their fatigue performance. With the help of post-processing techniques, the surface finish needs to be improved before the parts are operation ready for better fatigue performance. Self-terminating etching process (STEP) is one such post-processing technique that decreases the surface roughness by as much as 8× and increases the fatigue life by 340% compared to as-printed specimens for Ti64. In this work, we study the fatigue performances of Ti64 using sulfur-based STEP and GRCop42 using iodine-based STEP for surface finishing. The PBF specimens are studied in as-printed, stress-relieved, and post-STEP conditions by characterizing the surface roughness and microstructure. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |