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

Wu, P. P.; Ma, X. Q.; Zhang, J. X.; Chen, L. Q.
October 2008
Journal of Applied Physics;Oct2008, Vol. 104 Issue 7, p073906
Academic Journal
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.


Related Articles

  • Magnetic domain structure in a ferromagnetic shape memory alloy Ni[sub 51]Fe[sub 22]Ga[sub 27] studied by electron holography and Lorentz microscopy. Murakami, Y.; Shindo, D.; Oikawa, K.; Kainuma, R.; Ishida, K. // Applied Physics Letters;5/26/2003, Vol. 82 Issue 21, p3695 

    Behaviors of magnetic domains with cooling in a Ni[sub 51]Fe[sub 22]Ga[sub 27] ferromagnetic shape memory alloy were examined by electron holography and Lorentz microscopy. A peculiar meshy pattern was observed in the Lorentz microscope image of the parent phase, being concurrent with the...

  • Domain-wall structure and domain-wall strain. Lee, W. T.; Salje, E. K. H.; Bismayer, U. // Journal of Applied Physics;6/15/2003, Vol. 93 Issue 12, p9890 

    Stresses and strains within domain walls are important for understanding the interaction of domain walls with point defects, and the surface structure of the domain walls. Unfortunately, attempts to determine these properties of the domain wall by diffraction or other methods fail because of the...

  • Two-dimensional analysis to improve the output stress in ferromagnetic shape memory alloys. He, Y. J.; Chen, X.; Moumni, Z. // Journal of Applied Physics;Sep2011, Vol. 110 Issue 6, p063905 

    Most existing experiments investigating the martensite-variants reorientation (switching) of ferromagnetic shape memory alloys (FSMA) are in a simple 1D condition: An axial compressive stress and a transverse magnetic field. To obtain field-induced variant switching, however, the compressive...

  • Large magnetic-field-induced strains in Ni–Mn–Ga nonmodulated martensite. Chernenko, V. A.; Chmielus, M.; Müllner, P. // Applied Physics Letters;9/7/2009, Vol. 95 Issue 10, p104103 

    Large magnetic field-induced strains of up to 0.17% for a stress-free Ni53.1Mn26.6Ga20.3 single crystal with nonmodulated martensite phase were generated in a rotating magnetic field. This magnetic-field-induced strain, which is ten times larger than values reported so far for nonmodulated...

  • Reversible-strain criteria of ferromagnetic shape memory alloys under cyclic 3D magneto-mechanical loadings. He, Y. J.; Chen, X.; Moumni, Z. // Journal of Applied Physics;Aug2012, Vol. 112 Issue 3, p033902 

    Recent researches revealed that ferromagnetic shape memory alloys (FSMA) in 2D/3D configurations (with multi-axial stresses) had much more advantages (e.g., higher working stress and more application flexibility) than that in 1D configuration (with uniaxial stress). In literature, however, there...

  • Ab initio investigation of twin boundary motion in the magnetic shape memory Heusler alloy Ni2MnGa. Gruner, Markus; Entel, Peter; Opahle, Ingo; Richter, Manuel // Journal of Materials Science;Jun2008, Vol. 43 Issue 11, p3825 

    Magnetic shape memory (MSM) alloys, which transform martensitically below the Curie temperature in the ferromagnetic (FM) state, represent a new class of actuators. In Ni2MnGa, unusually large magnetic field-induced strains of about 10% have been observed. This effect is related to a high...

  • Phase-field simulation of strain-induced domain switching in magnetic thin films. Hu, Jia-Mian; Sheng, G.; Zhang, J. X.; Nan, C. W.; Chen, L. Q. // Applied Physics Letters;3/14/2011, Vol. 98 Issue 11, p112505 

    The strain-induced magnetic domain switching in epitaxial CoFe2O4 (CFO) thin films was studied using phase-field method. In particular, we investigated the domain switching from an initial in-plane direction to out-of-plane under the action of in-plane elastic strains. An abrupt switching...

  • Characterization of Magnetoelastic Coupling in Ferromagnetic Shape Memory Alloys Using Neutron Diffraction. Pramanick, Abhijit; Wang, Xun-Li // JOM: The Journal of The Minerals, Metals & Materials Society (TM;Jan2013, Vol. 65 Issue 1, p54 

    Ferromagnetic shape memory alloys (FSMA) are a new class of smart materials with unique properties and applications. The shape memory properties of FSMAs are due to a strong coupling between their elastic and magnetic properties. Understanding the physical origins of magnetoelastic coupling is...

  • Model for discontinuous actuation of ferromagnetic shape memory alloy under stress. Murray, S. J.; O'Handley, R. C.; Allen, S. M. // Journal of Applied Physics;1/15/2001, Vol. 89 Issue 2, p1295 

    Ferromagnetic shape memory alloys have demonstrated strains up to 5% resulting from the rearrangement of crystallographic variants by twin boundary motion under an applied field. A model is proposed that describes twin boundaries moving abruptly in order to accommodate either the mechanical...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics