Fast Actuation of Magnetic Shape Memory Material Ni-Mn-Ga Using Pulsed Magnetic Field
A. Saren, J. Tellinen, D. Musiienko, K. Ullakko
Lappeenranta University of Technology, Savonlinna, Finland
Pulsed magnetic field-induced actuation of magnetic shape memory material Ni–Mn–Ga 5M martensite has been studied. Saturation velocities of fast-moving single type II twin boundaries in a range of 35–39 m/s were directly observed using high-speed camera technique. Corresponding actuation velocities of 2.1–2.3 m/s were acquired using laser Doppler vibrometry technique, both for elongation and contraction of the sample. In a case of multiple twin boundaries motion, actuation velocities of 4–5.5 m/s and actuation accelerations of (4-7)×105 m/s2 were achieved. The actuation response time was measured to be less than 1 μs. The reported results have a potential for the development of new applications, especially in microscale devices where the working frequency can be significantly increased. Example potential applications are fast optical and electrical switches, pneumatic/hydraulic valves, microfluidic pumps and valves, micromanipulators and grippers.
ACTUATOR 2016 Manuscript A3.1
Publication date: 01/06/2016
Manuscript A3.1 published in Conference Proceedings ACTUATOR 2016
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