Induction heating method for thermomechanical study of NiTi shape memory alloy wire
Thermo-mechanically responsive shape memory alloys (SMA) with high strain generation have shown remarkable properties particularly, the shape memory effect when use as an actuator. However, in practical applications, it is difficult to characterize the shape memory behaviour due to the compl...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Zhongguo Hangkong Taikong Xuehui
2025
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| Online Access: | http://psasir.upm.edu.my/id/eprint/118501/ http://psasir.upm.edu.my/id/eprint/118501/1/118501.pdf |
| Summary: | Thermo-mechanically responsive shape memory alloys (SMA) with
high strain generation have shown remarkable properties particularly, the
shape memory effect when use as an actuator. However, in practical
applications, it is difficult to characterize the shape memory behaviour due to
the complex coupling interaction between load and temperature that resulted
in dynamic nonlinear hysteresis. The actuation capability of SMA is
depending on the heat control mechanism of SMA. Herein, a comprehensive
study is established for Flexinol NiTi wire using induction heating and
compared to established data to reveal the feasibility of induction heating for
SMA thermomechanical characterization. A precise regulated heat control
chamber utilizing inducting heating to control the non-linearities in
temperature measurement was used to control the heat transfer mechanism of
SMA. Temperature-induced shape memory effect of Flexinol NiTi wire with
preloads ranging from 5N to 25N were evaluated in terms of the phase
transformation temperatures, thermal hysteresis and the generated strains.
With increasing preloads, the phase transformation temperatures and
transformation strain also increased, while the thermal hysteresis decreased.
The strain-temperature curves during thermal loading at different loads
demonstrated a prominent shape memory effect using induction heating. The
experimental results signified that induction heating offer a regulated
temperature control and faster heating capability, thus become a promising
heating technique for SMA thermomechanical characterization. |
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