Technical Summary

NiTi is a shape memory alloy (SMA) known for its shape memory effect (SME), which allows the material to return to a pre-defined shape when heated above its transition temperature after deformation. The use of NiTi for actuation offers the potential to replace complex, multi-component systems with a single part, reducing manufacturing resources, maintenance costs, and energy consumption. NiTi’s high power-to-weight ratio makes it ideal for lightweight applications and miniaturization in cases requiring high mechanical performance within limited spaces. Its reliability, low maintenance, large stroke capability, and clean, quiet operation make it suitable for use in biomedical devices, robotics, automotive systems, and aerospace technology.

Josephine's research focuses on developing NiTi-based thermal and electro-mechanical actuators with bespoke mechanical responses at specific temperatures by laser powder bed fusion (PBF-LB). The project aims to gain a better understanding of how process parameters such as laser power, scan speed, and spot size influence the properties of NiTi parts produced by PBF-LB. Developing a comprehensive understanding of the relationship between PBF-LB parameters and the resulting actuator performance could allow precise control over both the geometry and microstructure of NiTi actuators, enabling tailored actuator responses for specific applications.