| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Additive Manufacturing: Microstructure and Material Properties of Titanium-based Materials
|
| Presentation Title |
Study the Effect of Thermal Gradients on the Microstructure and Mechanical Properties of Electron Beam Melting Ti-6Al-4V Builds |
| Author(s) |
Meiyue Shao, Sriram Vijayan, Evan Hass, Kayla Hepler, Joerg Jinschek |
| On-Site Speaker (Planned) |
Meiyue Shao |
| Abstract Scope |
Additively manufactured (AM) parts fabricated using electron beam powder fusion (EB PBF) experience complex and cyclic thermal gradients due to the layer by layer fabrication process. These thermal gradients are dependent on AM process parameters, such as input power, beam scan velocities, beam fill patterns, built height, which influence the as built the microstructure and mechanical properties of the build. Here, three different electron beam scan strategies were applied to fabricate Ti-6Al-4V builds. The microstructural variation across the build plane and along the build direction was observed by scanning electron microscopy (SEM) and electron backscattered diffraction (SEM-EBSD) across multiple locations in the build to detect significant trends. Further, Vickers microhardness data were obtained from each sample across the build plane and along the build direction. The results indicate that the microstructure and mechanical properties of Ti64 EBM builds strongly depend on the beam scan strategies. |