| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
A-101: Effects of Laser-energy Density and Build Orientation on the Defect Structure, Microstructure and Tensile Properties of Laser Powder Bed Fused Inconel 718 |
| Author(s) |
Dillon Watring, Jake Benzing, Nik Hrabe, Ashley Spear |
| On-Site Speaker (Planned) |
Dillon Watring |
| Abstract Scope |
This study investigates the processing-structure-property relationships for Inconel 718 (IN718) manufactured by laser powder bed fusion. Specifically, the influence of build orientation and laser-energy density on the defect structure, microstructure, and tensile properties was investigated. Three different combinations of build orientation and laser-energy density were selected for the IN718 specimens: 0° and 38 J/mm3, 0° and 62 J/mm3, and 60° and 62 J/mm3. In depth characterization of the three build conditions was performed using X-ray computed tomography, electron backscatter diffraction, backscattered electron imaging, and secondary electron imaging. A total of 32 mini-tensile specimens (gauge length of 3 mm) were tested to investigate the mechanical properties of the three build conditions. In the absence of as-built surface roughness, laser-energy density had a large effect on the mechanical properties and build orientation had very little effect . It was found that the defect structure dominates the mechanical properties with non-optimized laser-energy density. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |