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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-Zelai, Christopher Ledford, Quinn Campbell, Andrés Márquez Rossy, Donovan N Leonard, Michael Kirka
On-Site Speaker (Planned) Patxi Fernandez-Zelai
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


Additive Manufacture of Refractory Metals for Aerospace Applications
Additive Manufacturing of Refractory High Entropy Alloys
Case Studies on Additive Manufacturing of Refractory Materials
Design and Development of 3D Printable Nb-based Alloys for High Temperature Applications
Effect of Minor Titanium and Aluminum Addition on Ductility of Refractory High Entropy Alloy
Electron Beam Melting Additive Manufacturing of Pure Molybdenum
Enhancement of the Thermal Conductivity of Inconel 718 with the Addition of Tungsten
Fabrication of Pure Tungsten Using Electron Beam Powder Bed Fusion
Laser Assisted Cold Spray Deposition for Niobium and Tantalum Materials
Laser Beam Directed Energy Deposition Process Optimization for Refractory High Entropy Alloys
Laser Powder-bed-fusion of Pure Tungsten for Fusion Energy Applications
LPBF Printing of Nb for the Production of 3D Resonance Cavities
Mechanical Properties and Microstructural Characteristics of Additively Manufactured C103 Niobium Alloy
Refractory Development Framework Using Computational Modeling
Refractory Metals – Some Historical Observations
Study of Melt-pool Geometry and Microstructure in Pure W by Powder-feed Directed Energy Deposition
Thermal-chemical-fluid Flow of Dissimilar Species Mixing between Titanium and Refractory Metals
Union of Mo and Cr Alloys into a Single Multi-materials Part Using Laser-powder Directed Energy Deposition

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