University of Minnesota
Aerospace Engineering and Mechanics
Spring 2002 Seminar Series

Magneto-Mechanical Testing of Ferromagnetic Shape-Memory Alloys

Prof. Tom Shield

Department of Aerospace Engineering and Mechanics, University of Minnesota


Reviews of ferromagnetic materials and shape-memory materials will be presented to introduce the relatively new class of active materials that possess both ferromagnetic and shape memory properties. These ferromagnetic shape-memory alloys combine the large strains of shape-memory materials with actuation by magnetic fields. Thus, these materials show more promise as actuator materials than traditional shape-memory materials that need thermal actuation. Two specific ferromagnetic shape-memory alloys will be discussed: Iron-Palladium (FePd) and Nickel-Manganese-Gallium (NiMnGa). A recently constructed facility to test these materials, called a Magneto-Mechanical Testing Machine (MMTM), will be described. The MMTM can mechanically load a specimen while applying a magnetic field whose direction can vary in a plane containing the loading axis. Preliminary results from experiments on FePd single crystals will be discussed.

Friday, February 1, 2002
209 Akerman Hall
2:30-3:30 p.m.

Refreshments served after the seminar in 227 Akerman Hall.
Disability accomodations provided upon request.
Contact Kristal Belisle, Senior Secretary, 625-8000.