TITLE

Reversible-strain criteria of ferromagnetic shape memory alloys under cyclic 3D magneto-mechanical loadings

AUTHOR(S)
He, Y. J.; Chen, X.; Moumni, Z.
PUB. DATE
August 2012
SOURCE
Journal of Applied Physics;Aug2012, Vol. 112 Issue 3, p033902
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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 is no simple criterion to judge whether a cyclic 3D magneto-mechanical loading can induce a large reversible strain (via martensite reorientation in FSMA). In this paper, a 3D magneto-mechanical energy analysis is proposed and incorporated into a phase diagram in terms of deviatoric stresses (including mechanical and magneto-stresses) to study the path-dependent (hysteretic) martensite reorientation in FSMA under 3D cyclic loadings. Based on the phase diagram (a plane graph), general criteria for obtaining reversible strain under cyclic magneto-mechanical loadings are derived, which provide basic guidelines for FSMA's applications under multi-axial loadings. Particularly for FSMA actuators driven by cyclic magnetic fields, the criteria of setting the 3D mechanical stresses to allow field-induced reversible strain are formulated. The 3D criteria can be reduced to 1D and 2D criteria which agree with the existing 1D/2D theoretical and experimental studies.
ACCESSION #
78722632

 

Related Articles

  • Frequency response of acoustic-assisted Ni–Mn–Ga ferromagnetic-shape-memory-alloy actuator. Techapiesancharoenkij, Ratchatee; Kostamo, Jari; Allen, Samuel M.; O’Handley, Robert C. // Journal of Applied Physics;May2009, Vol. 105 Issue 9, p093923 

    A prototype of Ni–Mn–Ga based ferromagnetic-shape-memory-alloy (FSMA) actuator was designed and built; an acoustic-assist technique was applied to the actuator to enhance its performance. A piezoelectric stack actuator was attached to the Ni–Mn–Ga sample to generate...

  • Phase transitions in the ferromagnetic alloys Ni[sub 2+x]Mn[sub 1-x]Ga. Bozhko, A. D.; Vasil’ev, A. N.; Khovaılo, V. V.; Buchel’nikov, V. D.; Dikshteın, I. E.; Seletskiı, S. M.; Shavrov, V. G. // JETP Letters;2/10/98, Vol. 67 Issue 3, p227 

    The phase diagram of the cubic ferromagnetic shape-memory alloy Ni[sub 2+x]Mn[sub 1-x]Ga is constructed theoretically for the case when the Curie temperature is close to the structural transition temperature. This diagram agrees well with the experimental data obtained from resistance and...

  • 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...

  • 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...

  • The Thermal Transformation Arrest Phenomenon in NiCoMnAl Heusler Alloys. Xiao Xu; Wataru Ito; Masashi Tokunaga; Takumi Kihara; Kengo Oka; Rie Y. Umetsu; Takeshi Kanomata; Ryosuke Kainuma // Metals (2075-4701); 

    In this report, we present findings of systematic research on NiCoMnAl alloys, with the purpose of acquiring a higher thermal transformation arrest temperature (TA). By systematic research, TA in the NiCoMnAl alloy systems was raised up to 190 K, compared to the highest TA of 130 K in NiCoMnIn....

  • Ferromagnetic shape memory alloys for positioning with nanometric resolution. Feuchtwanger, Jorge; Asua, Estibalitz; García-Arribas, Alfredo; Etxebarria, Victor; Barandiaran, Jose M. // Applied Physics Letters;8/3/2009, Vol. 95 Issue 5, p054102 

    Ferromagnetic shape memory alloys are promising active elements for actuators. Our work centered on achieving and maintaining an intermediate fixed deformation so that they can be used as precision positioning actuators. For this purpose, a custom actuator was built using a single crystal of...

  • Magnetocaloric properties of as-quenched NiMnIn ferromagnetic shape memory alloy ribbons. Sánchez Llamazares, J.; García, C.; Hernando, B.; Prida, V.; Baldomir, D.; Serantes, D.; González, J. // Applied Physics A: Materials Science & Processing;Jun2011, Vol. 103 Issue 4, p1125 

    The temperature dependences of magnetic entropy change and refrigerant capacity have been calculated for a maximum field change of Δ H=30 kOe in as-quenched ribbons of the ferromagnetic shape memory alloy NiMnIn around the structural reverse martensitic transformation and magnetic transition...

  • Magnetic Properties of the Ferromagnetic Shape Memory Alloys Ni50+xMn27-xGa23 in Magnetic Fields. Takuo Sakon; Kohei Otsuka; Junpei Matsubayashi; Yuushi Watanabe; Hironori Nishihara; Kenta Sasaki; Satoshi Yamashita; Umetsu, Rie Y.; Hiroyuki Nojiri; Takeshi Kanomata // Materials (1996-1944);Sep2014, Vol. 7 Issue 9, p3715 

    Thermal strain, permeability, and magnetization measurements of the ferromagnetic shape memory alloys Ni50+xMn27-xGa23 (x = 2.0, 2.5, 2.7) were performed. For x = 2.7, in which the martensite transition and the ferromagnetic transition occur at the same temperature, the martensite transition...

  • Testing system for ferromagnetic shape memory microactuators. Ganor, Y.; Shilo, D.; Messier, J.; Shield, T. W.; James, R. D. // Review of Scientific Instruments;Jul2007, Vol. 78 Issue 7, p073907 

    Ferromagnetic shape memory alloys are a class of smart materials that exhibit a unique combination of large strains and fast response when exposed to magnetic field. Accordingly, these materials have significant potential in motion generation applications such as microactuators and sensors. This...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

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

Try another library?
Sign out of this library

Other Topics