ACTUATOR 2014 Manuscript A3.1

Author: Hubert Borgmann
Pages: 4
Language: English
Publication date: 08/04/2015
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Manuscript A3.1 published in Conference Proceedings ACTUATOR 2014
Actuating Acceleration of Over 1.6 Million m/s2 Measured in Smart Material Ni-Mn-Ga

K. Ullakko, A.R. Smith, J. Tellinen
Lappeenranta University of Technology, Savonlinna, Finland

The mechanism that is responsible for the large strains in the magnetic shape memory alloy Ni-Mn-Ga is the movement of twin boundaries caused by an internal magnetic-field-induced stress. Many applications, such as actuators, sensors and microdevices, would greatly benefit from further understanding of twin boundary dynamics in Ni-Mn-Ga. In this study, a novel experimental method was created and a twin boundary velocity of 82.5 m/s, an actuation response time of 2.8 μs and an actuation acceleration of 1.6 × 106 m/s2 were experimentally observed. These experimental results have also been validated by independently developed theoretical calculations. This is the most rapid actuation and twin boundary movement observed thus far for Ni-Mn-Ga and an important material property to understand. These results may have a significant impact on future applications where speed and precision are essential.
El vendedor asume toda la responsabilidad de esta entrada.
Hubert Borgmann, MESSE BREMEN,
Project Manager ACTUATOR, International Conference and Exhibition on New Actuators and Drive Systems, Bremen, Germany, and Editor of the ACTUATOR Conference Proceedings (
Project Manager ITHEC, International Conference and Exhibition on Thermoplastic Composites, Bremen, Germany, and Editor of the ITHEC Conference Proceedings (

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