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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Additive Manufacturing of Functional, Energy, and Magnetic Materials
Presentation Title Anisotropy in Thermo-mechanical Properties of NiTi Alloy Processed by Selective Laser Melting (SLM)
Author(s) Keyvan Safaei, Mohammadreza Nematollahi, Parisa Bayati, Fatemeh Kordizadeh Zavareh, Hossein Abedi, Mohammad Elahinia
On-Site Speaker (Planned) Keyvan Safaei
Abstract Scope Selective laser melting (SLM) is a free-form additive manufacturing (AM) method showing remarkable progress in fabricating shape memory alloys. The SLM process parameters make an eminent role in the microstructure of the fabricated parts. The high thermal gradient toward the building direction results in a textured microstructure along <001> direction and columnar grain morphology toward the building direction that is the main source of the anisotropic behavior of the SLM NiTi. In this work, the thermomechanical behavior of the additively manufactured NiTi coupons through selective laser melting method is investigated under torsion, compression, and tension. The X-ray diffraction patterns confirm the strong texture along <001> direction along the building direction. The specimens show a remarkable anisotropic thermomechanical behavior. The stress-strain responses show a dissimilar transformation behavior including critical stress and recoverable strain in different stress states. The in-situ strain monitoring also shows the strain localization in all samples.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Phase Transformations, Mechanical Properties

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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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