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Meeting Materials Science & Technology 2017
Symposium Non Beam-based Additive Manufacturing Approaches for Metallic Parts
Presentation Title Extrusion-based 3D-printing and Sintering of Ni-Mn-Ga and NiTi-Nb Shape Memory Alloys
Author(s) Shannon L Taylor, Amaka J Ibeh, Ramille N Shah, David C Dunand
On-Site Speaker (Planned) Shannon L Taylor
Abstract Scope We present a new additive manufacturing method that combines extrusion-based 3D-printing and sintering heat-treatments to create Ni-Mn-Ga magnetic shape-memory alloy (SMA) and NiTi-Nb SMA wires or micro-trusses. After (i) 3D-printing of a particle-based ink containing elemental or partially pre-alloyed Ni, Mn, and Ga powders, (ii) interdiffusion and homogenization to create the final alloy, and (iii) further sintering, controlled amounts of porosity are achieved in the Ni-Mn-Ga struts, which are beneficial to their twinning ability. Similarly, (i) 3D-printing of inks containing NiTi and Nb powders and (ii) liquid phase sintering, results in NiTi micro-trusses with struts containing some NiTi-Nb eutectic phase and residual porosity. We present the effects of the 3D-printing parameters and heat-treatment duration and temperature on the microstructure, porosity, and shape memory properties of the Ni-Mn-Ga and NiTi-Nb micro-trusses, using a combination of ex situ metallography, in situ X-ray tomography, and finite-element modeling.
Proceedings Inclusion? Definite: At-meeting proceedings

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

3D Inkjet Powder Printing of Implantable Biomaterials and Biomedical Device Prototypes
A-16: Binder Jet Printing of Partial Denture Metal Framework from Metal Powder
A-17: Detailed Microstructural and Electrochemical investigation of 3D Printed and Arc Melted 316L Stainless Steel
A-18: High Velocity Hybrid Thermal Spray Systems for 3-D Coatings
A-19: Large-scale Additive Manufacturing of Steel Structures
Additive Manufacturing Evaporative Casting
Additive Manufacturing of High-performance Copper Heat Exchangers via 3D Screen Printing
Additive Manufacturing Technology Based on Stationary Shoulder Friction Stir Welding for Aluminum Alloy
Assessment of Environmental Contamination in Ti-6Al-4V Parts Fabricated from the Laser Hot Wire Process
Binder Jetting 3D Printing: Improving Printer Capabilities and Expanding Available Materials
Densification and Sintering of Metallic Struts within Micro-trusses 3D-printed from Powder-based Liquid Inks
Direct Molten Metal Write of Structurally Significant Materials
Extrusion-based 3D-printing and Sintering of Ni-Mn-Ga and NiTi-Nb Shape Memory Alloys
Grain Growth And Densification Behavior Of 316L Stainless Steel Metallic Components Produced via Binder Jet-powder Printing (3-D) System Using Water Atomized Powders
Integrated Process Line for Fused Filament Fabrication of Metallic Parts Using Metal Powder Loaded Filaments
Large Scale Layered Object Manufacturing – Boundary Conditions for the Joining Process Diffusion Bonding
Mechanisms for Deformation and Film Formation from High Speed Aerosol Deposition of Ag
Metal Additive Manufacturing through Friction Stir-facilitated Deposition
Neutron Diffraction Mapping of Residual Stresses in Large-scale Wire-fed Additively Manufactured Components
Roadmap for Metal Hybrids Net-Shaped via Binder Jet Additive Manufacturing
Slumping during the Sintering of Cantilevered Beams: Experiments and Theory
Ultrasonic Additive Manufacturing State-of-the-Art

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