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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Additive Manufacturing of Functional, Energy, and Magnetic Materials
Presentation Title Effect of Processing Parameters on Thermal Cyclic Stability of Nitinol Alloys Manufactured by Selective Laser Melting
Author(s) Jianing Zhu, Evgenii Borisov, Johan Bijleveld, Eduard Farber, Marcel Hermans, Vera Popovich
On-Site Speaker (Planned) Jianing Zhu
Abstract Scope There is a growing demand in using additive manufacturing (AM) for production of smart components capable to respond to thermal and mechanical stimuli. In this study phase transformation behavior of equiatomic Nitinol alloy manufactured by selective laser melting (SLM) was investigated by differential scanning calorimetry (DSC) in the temperature range of -70 oC to 200 oC. Thermal cycling associated with functional fatigue was performed in order to characterize the phase transformation stability. Phase transformation temperatures of SLM Nitinol alloys were found to decrease with increasing number of cycles. The effect of SLM process parameters was further investigated to improve the phase transformation stability. The optimized samples featuring improved functional stability were found to be attributed to their fine-grained structure and pre-existing nano-scale precipitates. Hence, this work demonstrates that thermal cycling stability of SLM Nitinol alloys can be successfully tailored by changing AM processing parameters.
Proceedings Inclusion? Planned:


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
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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