Magnetic Shape Memory Alloys or MSMAs are a newly researched memory shape alloys that can have from 10-20% strain when a magnetic field is applied. The visible strain is due to reorientation of the martensitic variants within the alloy's microstructure. The advantage of MSMAs over conventional SMAs is in their ability to be operated over a much broader frequency range rather than just through heat transfer.
Dear Angela,
ReplyDeleteThe maximum possible strain under magnetic field for the Ni-Mn-Ga alloy is 10%. However, this particular alloy is not suitable for applications. The alloy Ni-Mn-Ga (5M) which has a maximum stroke of 6% is under intensive development and search for potential applications.
Sincerely, Yossi Ezer