| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Additive Manufacturing: Microstructure and Material Properties of Titanium-based Materials
|
| Presentation Title |
Study of Effects from Post-processing on the Fatigue Performances of Laser Powder Bed Fusion Built Parts Using Hydride-dehydride Ti-6Al-4V Powders |
| Author(s) |
Ziheng Wu, Amir Mostafaei, Nihal Sivakumar, Anthony Rollett |
| On-Site Speaker (Planned) |
Ziheng Wu |
| Abstract Scope |
Using hydride-dehydride (HDH) Ti64 powder in powder-based additive manufacturing processes is challenging owing to low packing density with aspherical particles but it can also significantly reduce the feedstock cost. Fabricating highly dense parts using this powder has been shown to be feasible in the laser powder bed fusion (LPBF) process, albeit with smaller hatch spacings than typically used. A more important step going forward is to demonstrate that the HDH parts have comparable fatigue life to standard printed Ti64. Specimens are fabricated in an EOS M290 using HDH Ti6Al4V powders with two different size distributions; additionally, different post-processing treatments are applied to further improve their fatigue lives. This study reports on the high-cycle fatigue performance of these HDH Ti64 parts and understanding how the fracture behaviors correlate with variable pore content as a function of process conditions. |