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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Additive Manufacturing of Refractory Metallic Materials
Presentation Title Union of Mo and Cr Alloys into a Single Multi-materials Part Using Laser-powder Directed Energy Deposition
Author(s) Vincent Jacquier, Julien Zollinger, Frédéric Schuster, Hicham Maskrot, Philippe Zeller, Wilfried Pacquentin
On-Site Speaker (Planned) Vincent Jacquier
Abstract Scope We present the fabrication and analysis of a refractory Mo-Cr multi-layer gradient created by LP-DED (Laser-Powder Directed Energy Deposition) with a 1.2 mm wide laser spot. An inductive heating system allows the preheating of the substrate to increase the delivered energy and mitigate crack formation. Mo being more refractory than Cr the injection of Mo powders in a Cr-rich melt pool leads to a Mo-Cr interface containing partially dissolved Mo particles. With increasing power and Mo content in subsequent layers the complete fusion of Mo powder in Mo-rich melt pools is obtained. The high measured micro-hardness is attributed to solid solution strengthening combined with the fine micrometric equiaxed grains generated. Deposition of Mo on Cr is eased by the generation of a compositional gradient which leverages the complete solubility of these two metals to smooth the abrupt changes in properties and process parameters, thus avoiding the overheating of the initial Cr layer.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, High-Temperature Materials, Surface Modification and Coatings


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Laser Assisted Cold Spray Deposition for Niobium and Tantalum Materials
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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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