Magnetic field and stress induced martensite reorientation in NiMnGa ferromagnetic shape memory alloy single crystals

Shape Memory Response in Ni<SUB>40</SUB>Co<SUB>10</SUB>Mn<SUB>33</SUB>Al<SUB>17</SUB> Polycrystalline Alloy

“…Yet, it is significantly higher than what is reported for NiMnGa single crystalline FSMAs, i.e. <5 MPa, 17) where the field-induced rearrangement of martensite variants is the mechanism responsible for MFIS. In the case of MFIRT, NiCoMnIn single crystals oriented along the [100] direction in the P phase were reported 8) to demonstrate magnetostress levels more than 20 MPa T À1 .…”

Constitutive modelling of magnetic shape memory alloys with discrete and continuous symmetries

“…The proposed Gibbs free energy and the general constitutive equations for FIVR are described in §6a. Experiments, related to these material systems, are mostly performed under two-dimensional magneto-mechanical loading conditions (see [51,52]) and motivated by experiments, a reduced form of the constitutive equations is presented in §6a(iv). The calibration of material parameters, a 5 , b 4 , b 10 , c 14 , a 1 , a 11 , a 3 , b 1 , b 2 , c 14 for this simple loading conditions can be found in [33,53].…”

Thermodynamics and Kinetics of Martensitic Transformation in Ni-Mn-based Magnetic Shape Memory Alloys

“…Other FMSMAs, such as Fe-Pd [3], Fe-Pt [4], Ni-Mn-Al [5], Ni-Co-Ga [6], Ni-Co-Al [7] and NiFe-Ga [8], have successively been reported. In Ni-Mn-Ga systems, a huge MFIS of about 9.4 % has been reported in 14M [9] and about 12 % in non-modulated [10] martensites, despite the fact that the output stress is limited to several MPa [11,12].…”