Long-Term Cyclic Loading of 10M Ni-Mn-Ga Alloys
Martensitic 10M Ni-Mn-Ga single crystals are usually applied in the magnetomechanical actuators. Their behavior in the long-term cycling and the factors influencing upon are thus important to know. There are several publications concerning this. However, consistent statistical data is still missing to large extent. In this report we review and analyze the data available in the literature. In conclusion it can be stated that 10M Ni-Mn-Ga single crystals survive well in long-term actuation (millions of cycles) when the frequency of twin variant reorientation is not exceeding 250 Hz, and the strain used in actuation is below 3 %. There are several factors influencing the long-term behavior and these are discussed in more details in this work.
I. Aaltio et al., "Long-Term Cyclic Loading of 10M Ni-Mn-Ga Alloys", Materials Science Forum, Vol. 684, pp. 203-214, 2011