| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Experimental Analysis of Rhombohedral NiTi Tube Actuators Using in Contact Conductive/Convective Heating Stage |
| Author(s) |
Lehar Asip Khan, Hasan Ayub, Corné Muilwijk, Eanna McCarthy, Inam Ul Ahad, Dermot Brabazon |
| On-Site Speaker (Planned) |
Lehar Asip Khan |
| Abstract Scope |
Nickel titanium (NiTi) based shape memory alloy actuators have attained considerable attention due to hight power to mass ratio, greater fatigue life and lower cost comparing to other materials. NiTi wires, sheets and tube shaped actuators are useful resources for harvesting heat energy. The present work aims to investigate the Rhombohedral (R-Phase) NiTi tube actuators. Heat treatment and mechanical shape setting is performed for fixing the shape memory properties of the tube. A test rig is designed and used with the capability to provide conductive and convective heating for cyclic heating and cooling of the nitinol tubes. The actuation force of the tubes is gauged by attaching springs of different stiffness. The effect of heat treatment on the phase is investigated by analysing the corresponding crystalline structure of the tubes using XRD technique. Further, the thermal expansion coefficient is investigated for the tubes heat treated at constant temperature (500°C) as a function of time. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Composites, Phase Transformations, |