| Numéro |
J. Phys. IV France
Volume 112, October 2003
|
|
|---|---|---|
| Page(s) | 997 - 1000 | |
| DOI | https://doi.org/10.1051/jp4:20031049 | |
J. Phys. IV France 112 (2003) 997
DOI: 10.1051/jp4:20031049
Ni-Mn-Ga AC engineering properties
C.P. Henry1, D. Bono1, J. Feuchtwanger1, S.M. Allen1, R.C. O'Handley1, H. Dorn2, J. Rule2 and S. Yoshikawa11 Massachusetts Institute of Technology, 77 Massachusetts Ave. 13-5130, Cambridge, MA 02139, U.S.A.
2 ACX/ CXICymer Inc., 215 First St., Cambridge, MA 02142, U.S.A.
Abstract
Magnetic-field-induced strains in Ni-Mn-Ga alloys have shown promise since their recent discovery. Large, free strains and
moderate AC strains that provide mechanical work have already been demonstrated by this author and others. If the development
of this ferromagnetic shape memory alloy (FSMA) is to continue towards application, its preparation and processing need to
routinized so that its properties are as consistent as possible. Here, a first look into the AC stiffness, susceptibility,
magneto-mechanical coefficient and coupling coefficient properties will be shown and their dependencies interpreted. Close
to the austenite start temperature, results shown here may indicate better AC actuation performance 10-20°C below the martensite
transformation temperature due to lattice softening. Through these results, an engineer will start to understand some of the
technical issues necessary for designing FSMAs into applications.
© EDP Sciences 2003