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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Additive Manufacturing of Functional, Energy, and Magnetic Materials
Presentation Title Selective Laser Melting of Defect-free NiTi SMA Parts Using a Process Optimization Framework
Author(s) Lei Xue, Chen Zhang, Kadri Can Atli, Bing Zhang, Alaa Elwany, Raymundo Arroyave, Ibrahim Karaman
On-Site Speaker (Planned) Lei Xue
Abstract Scope This study reports fully dense Nickel-titanium (NiTi) parts fabricated using laser powder bed fusion (L-PBF) and showed good ductility up to 16%, shape memory effect and partial superelasticity. The desired range of processing parameters was determined for two compositions NiTi powder guided by a framework based on single tracks experiments and an analytical model to predict the melt pool dimensions accurately. The defect free samples were fabricated and tested by following the framework. Functional properties of NiTi are highly sensitive to the composition hence the process parameters. The flexibility of parameter selection and potential composition control by elemental evaporation showed by this work may open the possibility to fabricate functional NiTi parts or device without post-processing.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Phase Transformations,


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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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