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Phase-field simulations of stress-strain behavior in ferromagnetic shape memory alloy Ni2MnGa

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4 Author(s)
Wu, P.P. ; Department of Physics, University of Science and Technology Beijing, Beijing 100083, China ; Ma, X.Q. ; Zhang, J.X. ; Chen, L.Q.

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The evolution of strain, magnetic domain structure, and martensite microstructure during compressive stress loading and unloading of Ni2MnGa was studied using a phase-field model at several selected magnetic fields. We observed a typical quasiplastic behavior at zero field and a pseudoelastic behavior at 300 kA/m. At an intermediate field, 150 kA/m, the stress-strain relation is partially pseudoelastic. It was demonstrated that the magnetic domain structure has little influence on the recovered strain while the demagnetization factor impacts the strain reversal.

Published in:

Journal of Applied Physics  (Volume:104 ,  Issue: 7 )