About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing and Innovative Powder/Wire Processing of Multifunctional Materials
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Presentation Title |
Investigating the Effect of VED and Lattice Strut Diameter on the Shape Memory Effect of Nitinol Actuators |
Author(s) |
Josephine Emily Ryan Murphy, Dermot Brabazon, Inam Ul Ahad, Josiah Chekotu, Paul Healy |
On-Site Speaker (Planned) |
Josephine Emily Ryan Murphy |
Abstract Scope |
This study explores the potential of additive manufacturing (AM) to produce nickel-titanium (nitinol) shape memory alloy (SMA) actuators. By optimizing AM process parameters, nitinol’s properties can be tailored for specific applications. Nitinol's unique properties, including the shape memory effect (SME), combined with AM's ability to produce complex geometries such as lattice structures, offer lightweight and high strength alternatives to traditional actuation systems. The research investigates the effect of volumetric energy density (VED) during laser powder bed fusion (LPBF) and lattice strut diameter on the thermal and mechanical properties of nitinol lattices. Lattice structures achieving up to 8 % SME recovered strain and 1% residual strain for 12 % applied strain were printed with 49.4 at. % Ni. Actuator performance was assessed through compression-heat recovery experiments using universal testing machines and characterized using DSC, XRD, EDX, and SEM to optimize actuator response parameters. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Characterization, Other |