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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Additive Manufacturing of Functional, Energy, and Magnetic Materials
Presentation Title Engineered Interconnected Porosity for Enhanced Functional Devices
Author(s) Scott N. Roberts, Ben Furst, Eric Sunada
On-Site Speaker (Planned) Scott N. Roberts
Abstract Scope In general, porosity is seen as a failure in additive manufacturing processes. However, in some instances, controlled porosity can be used as a positive. Through careful control of various machine parameters in a powder bed fusion machine, we have been able to crate tunable interconnected open porosity structures in SS316L, Ti-6-4, AlSi10Mg, and Inconel 625. Pore sizes can range from sub-micron to 250 μm. Porosities span 0 to 60%. Additionally, structures with multiple porosities (or fully solid) regions can be created, enabling greater design freedom than previously available. By combining our porous settings with previously demonstrated scan strategies we can create pores of arbitrary geometry. Characterization of the properties of our porous structures (e.g., electrical conductivity, tensile/compressive strength, elastic moduli) will also be discussed. We have also demonstrated our ability to integrate local porosity control as a method for fabricating devices such as integrated heat pipes, filters, and more.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Mechanical Properties, Other


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An Additive Manufacturing Design Approach to Achieving High Strength and Ductility in Traditionally Brittle Alloys via Laser Powder Bed Fusion
Cold Spray of Permanent Magnets
Composition Control in Laser Powder Bed Fusion Additive Manufacturing Through Differential Evaporation
Development of High-temperature Permanent Magnet Alloys for Additive Manufacturing
Effect of Processing Parameters on Thermal Cyclic Stability of Nitinol Alloys Manufactured by Selective Laser Melting
Engineered Interconnected Porosity for Enhanced Functional Devices
Establishing Fundamentals for Laser Metal Deposition of Functional Ni-Mn-Ga Alloys: Effect of Rapid Solidification on Microstructure and Phase Transformation Characteristics
Inconel-steel Multi-metal-material by Liquid dispersed Metal Powder Bed Fusion: Microstructure, Stress and Property Gradients
Meltpool Oxidation and Reduction and Inclusion Evolution during the PBF Type Additive Manufacturing
Modeling of Selective Laser Melting of NiTi Shape Memory Alloy: Laser Single Track and Melt Pool Dimension Prediction
Selective Laser Melting of Defect-free NiTi SMA Parts Using a Process Optimization Framework
Toward Understanding the Effect of Selective Laser Re-melting on the Mechanical Properties of the SLM Fabricated Nitinol

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