Model calculation of 3D-phase transformation diagram of ferromagnetic shape memory alloys

Abstract A stress–magnetic field–temperature phase diagram of polycrystalline Fe–30.5%Pd ferromagnetic shape memory alloy (FSMA) is constructed based on experimental results and a thermodynamic model. The 3D-phase transformation diagram provides a key performance map in guiding us which actuation mechanism is the best for a given FSMA. According to this 3D-phase transformation diagram, the magnetic field induced transformation is found to be insignificant, while the hybrid mechanism based on the stress-induced martensitic transformation induced by the magnetic field gradient is more attractive. The NiMnGa system is also examined.

[1]  Minoru Taya,et al.  Spring-based actuators , 2002, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[2]  P. J. Webster,et al.  Magnetic order and phase transformation in Ni2MnGa , 1984 .

[3]  Minoru Taya,et al.  Design of diaphragm actuator based on ferromagnetic shape memory alloy composite , 2003, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[4]  Minoru Taya,et al.  Design of spring actuators made of ferromagnetic shape memory alloy and composites , 2003, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[5]  M. Wuttig,et al.  Occurrence of ferromagnetic shape memory alloys (invited) , 2000 .

[6]  M. Taya,et al.  Straining of NiMnGa by stress and magnetic fields , 2001 .

[7]  M. Taya,et al.  Stress-induced FCC/FCT phase transformation in Fe-Pd alloy , 2002 .

[8]  V. V. Kokorin,et al.  Magnetically controlled shape memory effect in Ni2MnGa intermetallics , 1997 .

[9]  Richard D. James,et al.  Large field-induced strains in ferromagnetic shape memory materials , 1999 .

[10]  Dimitris C. Lagoudas,et al.  Recoverable stress-induced martensitic transformation in a ferromagnetic CoNiAl alloy , 2003 .

[11]  Richard D. James,et al.  Occurrence of ferromagnetic shape memory alloys , 2000, Smart Structures.

[12]  V. V. Kokorin,et al.  Large magnetic‐field‐induced strains in Ni2MnGa single crystals , 1996 .

[13]  Minoru Taya,et al.  Design of torque actuators based on ferromagnetic shape memory alloy composites , 2003, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[14]  F. Moon,et al.  Magneto-Solid Mechanics , 1986 .

[15]  Samuel M. Allen,et al.  Field-induced strain under load in Ni–Mn–Ga magnetic shape memory materials , 1998 .

[16]  Minoru Taya,et al.  Structural change and straining in Fe–Pd polycrystals by magnetic field , 2003 .

[17]  Minoru Taya,et al.  Development of Ferromagnetic Shape Memory Alloys Based on FePd Alloy , 2001 .

[18]  Minoru Taya,et al.  Design of torque actuator based on ferromagnetic shape memory alloy composite , 2004, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[19]  H. Maier,et al.  Shape memory behavior of FeNiCoTi single and polycrystals , 2002 .