The evolution of strain, magnetic domain structure, and martensite microstructure during compressive stress loading and unloading of Ni2 MnGa 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.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)