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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Additive Manufacturing of Refractory Metallic Materials
Presentation Title Influence of Dislocation Structures on Mechanical Response in Additively-manufactured Ta-2.5%W Across Length Scales
Author(s) Kaila Morgen Bertsch, Marissa Linne, Stephen Burke, Riley Wraith, Joseph McKeown, Hye-Sook Park
On-Site Speaker (Planned) Kaila Morgen Bertsch
Abstract Scope Tantalum-tungsten alloys are of increasing research interest for applications such as hypersonics, plasma-facing reactor components, and rocket nozzles due to their high melting temperatures and balance of ductility and strength. Additive manufacturing (AM) offers the geometrical flexibility for potential rapid prototyping of these alloys. However, AM can induce distinctive microstructures that influence material performance, ranging from microcracks and pores to dislocation structures, whose effects remain poorly understood. In this work, the mechanical performance of AM and wrought Ta-2.5%W materials were evaluated under uniaxial tension via in situ SEM straining, demonstrating higher yield strength in AM material but similar failure characteristics. The microstructures were further characterized ex situ via SEM, EBSD, EDS, and TEM before and after loading to analyze the microstructural evolution throughout deformation and failure. By linking observations across length scales, new insights were gained regarding the influence of AM defects, segregation, and particularly dislocation structures on mechanical response.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Mechanical Properties, High-Temperature Materials

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A-38: Development and Assessment of a Novel TiVNbMo-based Refractory High Entropy Alloy Manufactured by Laser Powder Bed Fusion for High Temperature Applications
A-39: Development of Molybdenum Parts for High Temperature Applications with Laser Directed Energy Deposition Additive Manufacturing
A-40: Investigation into Wire Arc Additive Manufacturing Titanium-Zirconium-Molybdenum (TZM) Alloy
A-85: Directed Energy Deposition of Niobium and Related Alloys
A 3D Printable Refractory High Entropy Alloy with Excellent Mechanical Properties
Additive Manufacturing of Refractory Coatings for Ultra-high Temperature Applications: A Study on the Effect of Substate Dilution
Characterizing the High Temperature Mechanical Performance and Microstructure of Additively Manufactured Tantalum and Tungsten Alloys
Crack Mitigation Strategies for Pure Tungsten via Laser Powder-bed-fusion
Design of Silicide Strengthened Nb Alloys for Additive Manufacturing
Development and Additive Manufacturing of RHEA for Extreme Environment Applications
Development of Molybdenum Alloys for Use with Powder Blown Laser Directed Energy Deposition Additive Manufacturing
Development of W-based Alloys for High Temperature Applications by Additive Manufacturing
Direct Energy Deposition of Nb-containing Refractory Alloys: Solidification Behavior, Microstructural Evolution, and Mechanical Properties
Elucidating the Porosity-Cracking Tradeoff in Laser-based Additive Manufacturing of Refractory Metals
Enabling Future Concepts in Nuclear Energy through the Use of Additive Manufacturing on Titanium – Zirconium – Molybdenum Alloy
ICME Analysis Microcracking of Tungsten in Rapid Solidification
Influence of Dislocation Structures on Mechanical Response in Additively-manufactured Ta-2.5%W Across Length Scales
Interfacial Microstructures between Mo and Stainless Steel Fabricated by Directed Energy Deposition for High Temperature Service Applications
Investigating AM High Temperature Multi-materials with Nickel and Niobium Alloys
Laser Powder Bed Fusion of Niobium and Exploration of Gradient Composites by Local Addition of Nanoparticles
Laser Powder Bed Fusion Process Development for Re
Materials and Processing Design for Binder Jet Additive Manufacturing of Tungsten Alloys
Melt Pool Geometry and Defect Susceptibility in Laser Powder Bed Fusion of Single Phase Refractory Alloys
Novel Refractory Metals Optimized for Additive Manufacture to Improve Printability and Properties
Probing Processing Defects in Novel Refractory High Entropy Alloys via In-situ Dynamic X-ray Radiography
Processing, Structure, and Properties of Electron Beam Melting Additively Manufactured Pure Tungsten
Rhenium Modified Spherical Tungsten Powder for Additive Manufacturing
Towards High-Throughput Assessment of Printability in Refractory Alloys Systems for Laser-Powder Bed Fusion

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