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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Additive Manufacturing of Refractory Metallic Materials
Presentation Title Refractory Development Framework Using Computational Modeling
Author(s) Nathan Daubenmier, Antonio Ramirez, Fredrick Michael, Jeffrey Sowards, Omar Mireles
On-Site Speaker (Planned) Nathan Daubenmier
Abstract Scope The high melting temperature of refractory alloys is beneficial for specialized flight applications including Nuclear Thermal Propulsion, green propulsion, and hypersonic flight. Refractory elements such as tungsten and molybdenum, however, often compromise material strength and microstructure due to post solidification cracking and low strength. The high cost of acquisition and production of refractory alloys makes a widescale study of substitutional and interstitial elemental additions difficult. Computational modeling methods including calculation of phase diagrams (CALPHAD) provide cost and time effective options for analyzing wide compositional ranges to determine the effect of alloying methods for target material properties. A comprehensive analysis of a refractory system investigated grain growth, grain pinning, strength, DBTT, and other thermodynamic results to allow for down selection of alloying elements for ideal post-solidification material properties. This procedure is suggested as a framework for refractory alloy development to improve the starting point of physical production and testing of alloys.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Modeling and Simulation, Solidification


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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