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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Additive Manufacturing and Innovative Powder Processing of Functional and Magnetic Materials
Presentation Title Additively Manufactured Nitinol for Prescribed Properties and Prediction of Its Bulk Elastic Properties by Molecular Dynamic Simulation
Author(s) Jeongwoo Lee, Yung C. Shin
On-Site Speaker (Planned) Yung C. Shin
Abstract Scope Due to such special mechanical properties, Nitinol has become one of the most promising shape-memory materials for various applications in engineering fields. In this work, Nitinol structures were synthesized in a fully dense form using an additive manufacturing method from elemental powders to arrive at the prescribed final chemical compositions. Combined with proper post-heat treatments prescribed overall chemical and phase compositions were obtained to achieve requisite mechanical and phase transformation properties. The transformation temperatures of Nitinol samples were controlled accurately by less than 5C away from the target by changing post-heat treatment conditions. The mechanical properties were controlled to achieve various elastic modulus based on phase compositions. In addition, molecular dynamics simulation based on the polycrystalline microstructure was successfully carried out to predict realistic bulk elastic properties, which can be used to show the effects of different grain structures and phase distribution in Nitinol.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Mechanical Properties, Mechanical Properties

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Additively Manufactured Nitinol for Prescribed Properties and Prediction of Its Bulk Elastic Properties by Molecular Dynamic Simulation
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Selective Laser Melting of NiTi: Experiments and Modeling to Correlate Hatch Spacing, Texture, Residual Stress, and Superelastic Response
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