The effect of non-conventional electrical pulse treatment on microstructure and shape memory response of Ni49Ti51 wires was studied. High-power rapid current square pulses were applied to cold-drawn wires of 25 ?m diameter. The TEM microstructures showed equiaxial recrystallization, with average grain size in the 100 nm range, after a double current pulse lasting 10 ms. Rapid current pulse treatment in Ti-rich NiTi induces shape memory effect with reduced thermal hysteresis and high recovery strain values. This novel treatment might replace conventional pre-device shape setting/training of the wire with a post-device shape setting with promising industrial advantages. © 2014 ASM International.
Electrical pulse shape setting of thin Ni49Ti51 wires for shape memory actuators
Tuissi A
2014
Abstract
The effect of non-conventional electrical pulse treatment on microstructure and shape memory response of Ni49Ti51 wires was studied. High-power rapid current square pulses were applied to cold-drawn wires of 25 ?m diameter. The TEM microstructures showed equiaxial recrystallization, with average grain size in the 100 nm range, after a double current pulse lasting 10 ms. Rapid current pulse treatment in Ti-rich NiTi induces shape memory effect with reduced thermal hysteresis and high recovery strain values. This novel treatment might replace conventional pre-device shape setting/training of the wire with a post-device shape setting with promising industrial advantages. © 2014 ASM International.| File | Dimensione | Formato | |
|---|---|---|---|
|
prod_283171-doc_101091.pdf
solo utenti autorizzati
Descrizione: Electrical pulse shape setting of thin Ni49Ti51 wires for shape memory actuators
Dimensione
617.46 kB
Formato
Adobe PDF
|
617.46 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
