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Shape Memory Behavior of Ni-Mn-Ga Ferromagnetic Shape Memory Alloy
AIP Conference Proceedings, 2010We have systematically studied the effect of Mn substitution in Ni, Ga and both (Ni, Ga) sites on structural, magnetic and transformation behavior of Ni‐Mn‐Ga Ferromagneti Shape Memory Alloy (FSMA). We find that the substitution of Mn on Ni site decreases the transformation temperatures and the substitution of Mn on Ga site increases the transformation
R. Chokkalingam +12 more
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Shape memory and magnetic properties of Co–Al ferromagnetic shape memory alloys
Materials Science and Engineering: A, 2006Abstract Martensitic transformation from the face-centered cubic to the hexagonal close-packed structure, shape memory (SM) effect and magnetic properties in the Co–14 at.% Al alloy were investigated and the microstructures of the martensite were examined using transmission electron microscopy.
T. Omori +4 more
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New Ferromagnetic and Functionally Graded Shape Memory Alloys
ChemInform, 2003AbstractFor Abstract see ChemInform Abstract in Full Text.
C. M. Craciunescu, M. Wuttig
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Martensitic transformation in Co2NiGa ferromagnetic shape memory alloys
Scripta Materialia, 2002Abstract This investigation of the martensitic transformation in ferromagnetic Co2NiGa shape memory alloys shows that, like in the Ni2MnGa system, the martensite start temperature is proportional to the valence electron concentration. Al is increasing the transition temperatures when it substitutes Ga and is decreasing them when it substitutes Ni.
Corneliu Craciunescu +3 more
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High-frequency performance of ferromagnetic shape memory alloys
Annals of Solid and Structural Mechanics, 2016We conduct systematic dynamic experiments on the martensite reorientation in different samples of the single crystal Ni–Mn–Ga Ferromagnetic Shape Memory Alloy (FSMA) driven by a high-frequency magnetic field and a compressive stress. It is found that the output reversible strain strongly depends on the loading frequency, with the maximum output strain ...
Pascan, Oana-Zenaida +3 more
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Characterization and properties of ferromagnetic shape memory alloys
Materials Characterization, 2011Abstract Ni–Mn–Ga shape memory alloys are employed for applications in actuators and sensing devices. These alloys exhibit ferromagnetic shape memory effect with large reproducible strains in moderate magnetic fields. This work presents a study of the effect of composition and annealing treatment on the microstructure and magnetic properties in Mn ...
F. Ahmad Khalid, S. Zameer Abbas
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Phase equilibrium of ferromagnetic shape memory alloy Co39Ni33Al28
Scripta Materialia, 2006Co39Ni33Al28 ribbon with a b phase structure, which exhibited a martensitic transformation to L10 phase, was found to be unstable and decomposed into a b + c phase mixture upon heating to above 973 K. The double-phase structure was found to exhibit no martensitic transformation, despite the presence of the b phase. This is ascribed to the change of the
Z LIU +6 more
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Magnetomechanical testing machine for ferromagnetic shape-memory alloys
Review of Scientific Instruments, 2003Recently, a new class of active materials, known as ferromagnetic shape-memory alloys, has shown promise as actuator and sensor materials. These alloys, such as Ni2MnGa and Fe3Pd, are ferromagnetic and undergo a reversible diffusionless structural phase transformation giving rise to shape-memory behavior.
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Ferromagnetic Shape Memory Alloy Actuators
2008Yuanchang Liang, Minoru Taya
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