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Energy absorption in Ni-Mn-Ga-polymer composites

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9 Author(s)
Feuchtwanger, Jorge ; Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 ; Michael, Sadie ; Juang, Jiankang ; Bono, David
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Martensitic Ni-Mn-Ga single crystals are easily twinned and the twin boundaries can be displaced by applying a mechanical stress or magnetic field. Twin boundary motion is a highly dissipative process. Composites of aligned Ni-Mn-Ga particles in a polymer matrix show evidence of stress-induced twin boundary motion that results in stress-strain curves with significantly greater hysteresis than for Fe-polymer composites or polymer samples. © 2003 American Institute of Physics.

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Journal of Applied Physics  (Volume:93 ,  Issue: 10 )