Journal
ACTA MATERIALIA
Volume 56, Issue 18, Pages 5130-5137Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2008.06.030
Keywords
Magnetic shape memory; Dynamic mechanical analysis; Twinning
Funding
- DFG [SPP1239]
Ask authors/readers for more resources
The actuation performance and twin-boundary velocity in bulk NiMnGa magnetic shape memory single crystals at various frequencies are investigated. A dynamic actuation experimental setup with the ability to apply mechanical stress and a high-frequency alternating magnetic field is developed in tandem with time-resolved optical microscopy. Reversible twin-boundary motion activated in the frequency range up to 600 Hz is directly observed. The maximum field-induced strain increases with actuation frequency. Strain hysteresis curves measured at different frequencies show similar onset fields of strain. The data imply that twin-boundary velocity is not the limiting factor on actuation performance. The results provide significant information on twin-boundary performance during high-frequency actuation. Crown copyright (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available