An Intermetallic NiTi-Based Shape Memory Coil Spring for Actuator Technologies
| Autor: | Tae-Hoon Kim, Sang-Youn Kim, Ganesh Shimoga |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
mechatronics soft robotics Materials science shape memory alloy Mining engineering. Metallurgy Metals and Alloys Soft robotics Intermetallic TN1-997 Mechanical engineering 02 engineering and technology Shape-memory alloy NiTi coil spring 021001 nanoscience & nanotechnology actuators 01 natural sciences Coil spring Corrosion Robotic systems Nickel titanium 0103 physical sciences General Materials Science 0210 nano-technology Actuator |
| Zdroj: | Metals, Vol 11, Iss 1212, p 1212 (2021) |
| ISSN: | 2075-4701 |
| Popis: | Amongst various intermetallic shape memory alloys (SMAs), nickel–titanium-based SMAs (NiTi) are known for their unique elastocaloric property. This widely used shape remembering material demonstrates excellent mechanical and electrical properties with superior corrosion resistance and super-long fatigue life. The straight-drawn wire form of NiTi has a maximum restorable strain limit of ~4%. However, a maximum linear strain of ~20% can be attained in its coil spring structure. Various material/mechanical engineers have widely exploited this superior mechanic characteristic and stress-triggered heating/cooling efficiency of NiTi to design smart engineering structures, especially in actuator technologies. This short technical note reflects the characteristics of the NiTi coil spring structure with its phase transformations and thermal transformation properties. The micro-actuators based on NiTi have been found to be possible, suggesting uses from biomedical to advanced high-tech applications. In recent years, the technical advancements in modular robotic systems involving NiTi-based SMAs have gained speculative commercial interest. |
| Databáze: | OpenAIRE |
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