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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Additive Manufacturing of Functional, Energy, and Magnetic Materials
Presentation Title Establishing Fundamentals for Laser Metal Deposition of Functional Ni-Mn-Ga Alloys: Effect of Rapid Solidification on Microstructure and Phase Transformation Characteristics
Author(s) Emily Flitcraft, Jakub Toman, Markus Chmielus, Carolin Fink
On-Site Speaker (Planned) Emily Flitcraft
Abstract Scope Laser-based additive manufacturing holds the promise of enabling complex geometries for shape memory alloy components. However, rapid melting, resolidification and multiple reheating create challenging microstructures characteristic of non- or low-functional alloys. We investigate how non-equilibrium processing and complex thermal cycling effect microstructural evolution and functional properties in Ni-Mn-Ga magnetic shape memory alloys. This talk gives insight into our efforts to establish cooling rate-microstructure-magnetic property relations that will help identify processing conditions for laser metal deposition (LMD) of functional Ni-Mn-Ga alloy. Physical simulation of rapid solidification achieved cooling rates that resemble what is seen in LMD (102-104 K/s). Microstructure characterization was performed as a function of cooling rate using scanning electron microscopy, electron dispersive spectroscopy, and X-ray diffraction. The effect of cooling rate on phase transformation characteristics was investigated using differential scanning calorimetry. If available at time of presentation, results from magnetic property measurements using vibrating-sample magnetometer will also be included.
Proceedings Inclusion? Planned:


Additive Manufacturing of Functionally Graded Shape Memory Alloys
Additive Manufacturing of Soft Magnets for Electrical Machines—Prospects and Challenges
Advanced Design for Lightweighting Wind Power Generators Using Additively Manufactured Hard and Soft Magnets
An Additive Manufacturing Design Approach to Achieving High Strength and Ductility in Traditionally Brittle Alloys via Laser Powder Bed Fusion
Anisotropy in Thermo-mechanical Properties of NiTi Alloy Processed by Selective Laser Melting (SLM)
Cold Spray of Permanent Magnets
Composition Control in Laser Powder Bed Fusion Additive Manufacturing Through Differential Evaporation
Development of Fine Scale Permanent Magnets with Advanced Manufacturing
Development of High-temperature Permanent Magnet Alloys for Additive Manufacturing
Effect of Process Parameters on the Microstructure and Properties of Additively Manufactured NiTi-Based Shape Memory Alloys
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
Influence of Composition and Microstructure on Magnetic Properties of Additively Manufactured Fe/Co/Ni Based Soft Magnetic Alloys
Investigation of the Mechanical Properties of the Zamak 5 Alloy by Using Multislide and Conventional Method
Investigation of the Wear Behavior of Zamak 5 Alloy Using Multislide and Conventional Method
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
Review: 3D Printing Energetics
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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