| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Length-Scale Phenomena in Mechanical Response
|
| Presentation Title |
Precipitation Hardening of Laser Powder Bed Fusion Ti-6Al-4V |
| Author(s) |
Nicholas A. Derimow, Jake T. Benzing, Jacob Garcia, Howie Joress, Ping Lu, Newell Moser, Chad Beamer, Frank W. DelRio, Nik Hrabe |
| On-Site Speaker (Planned) |
Nicholas A. Derimow |
| Abstract Scope |
Solution-treatment followed by over-aging (STOA) in wrought Ti-6Al-4V has been historically understood to produce fine Ti3Al precipitates that are coherent with the α phase. This intermetallic Ti3Al phase, referred to as α2, produces a strengthening effect while maintaining the ductility of the alloy. The present study utilizes STOA on laser powder bed fusion (PBF-L) Ti-6Al-4V to precipitate α2 within the α phase by means of sub-β transus hot isostatic pressing (HIP) treatments followed by vacuum annealing at 545 C for 100 hours. The processing-structure-properties (PSP) relationships were investigated by means of synchrotron X-ray diffraction, scanning and transmission electron microscopy, atom probe tomography, and quasi-static uniaxial tensile testing. The HIP STOA condition resulted in the highest strength with no loss in ductility when compared to standard HIP treatments and will be discussed with respect to microstructures that are achievable with PBF-L. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Titanium, Phase Transformations |