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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Additive Manufacturing of Functional, Energy, and Magnetic Materials
Presentation Title Additive Manufacturing of Functionally Graded Shape Memory Alloys
Author(s) Mohammadreza Nematollahi, keyvan Safaei, Parisa Bayati, Mohammad Elahinia
On-Site Speaker (Planned) Mohammadreza Nematollahi
Abstract Scope It is well-known that NiTi shape memory alloys’ properties are highly composition and structure-dependent. Additionally, we have previously shown that processing NiTi through additive manufacturing (AM) techniques can be used to tailor properties such as transformation temperatures and microstructures through varying process parameters (PPs). In this study, two sets of PPs were used to additively manufacture a functionally graded NiTi using one initial powder feed with 50.8 at. % of Ni. The monolithic superelastic-shape memory part was characterized through DSC, XRD, SEM, and optical microscopy, and mechanical testing. One set of PPs resulted in an austenite finish temperature of 21 C, which suggested superelastic behavior at room temperature, while the other portion showed shape memory effect with Af of 86 C. XRD analysis confirmed the SE and SMA phases at room temperature consistent with the mechanical and DSC results. In-situ strain observations revealed the evolution of stress-strain in the part.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Characterization, Phase Transformations


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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