| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Electron Beam Melting Additive Manufacturing of Pure Molybdenum |
| Author(s) |
Patxi Fernandez-Zelaia, Christopher Ledford, Quinn Campbell, Andrés Márquez Rossy, Donovan N Leonard, Michael Kirka |
| On-Site Speaker (Planned) |
Patxi Fernandez-Zelaia |
| Abstract Scope |
Electron beam melting (EBM) additive manufacturing (AM) is an attractive technology for printing refractory metals. A great deal of the existing molybdenum research is focused on laser based processing with relatively little EBM work. In this presentation we share recent work on EBM processing of full-dense, defect-free, molybdenum. We observed analomous microstructures consisting of sharp {001}, {111}, and mixed {001} & {111} crystallographic fibers in the build direction. The preference for these build direction fibers is dependent on the imposed surface energy density and which is likely due to changes in the weld pool morphology. Detailed microscopy demonstrates that columnar grains consist of much finer equiaxed subgrains suggesting large process induced stresses which drives plastic deformation. Furthermore, the resulting build direction fiber may be controlled, and exploited, towards fabricating components with meso-scale composite microstructures which may be used for optimizing engineering properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Characterization |