Results 211 to 220 of about 2,536 (262)

NiMnGa polycrystalline magnetically activated shape memory alloys

IEEE Transactions on Magnetics, 2000
We report on the structural characteristics, magnetic properties and magnetically induced deformations obtained on as produced and annealed samples of bulk polycrystalline NiMnGa alloys. Extensive structural, magnetic and magnetomechanical characteristic are presented.
PASQUALE, MASSIMO, SASSO, CARLO PAOLO, S. BESSEGHINI, F. PASSARETTI, E. VILLA, A. SCIACCA   +5 more
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Magnetization and shape memory effect of ferromagnetic shape memory alloy wire

IEEE Transactions on Magnetics, 1999
Magnetization and shape memory effect (SME) of Fe-Mn-Cr-Si, magnetic shape memory alloy(SMA) have been investigated. The specimen used is a commercial product wire of diameter 1.2 mm. The properties largely depend on heat treatment conditions, so it is treated thermally under three different conditions. As a result, pre-heating before heat treatment is
T. Kanada, M. Enokizono
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Magnetically driven shape memory alloys

Journal of Magnetism and Magnetic Materials, 2002
Abstract Magnetically driven shape memory alloys experience the martensitic transformation while being in a ferromagnetic state. Two-way shape memory can be achieved through the shift of martensite–austenite transition, and a giant magnetostriction could be obtained through the redistribution of martensitic variants under magnetic field.
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Nonlinear dynamics of a magnetic shape memory alloy oscillator

Proceedings of the XIX International Symposium on Dynamic Problems of Mechanics, 2023
Abstract Magnetic shape memory alloys (MSMAs) constitute a class of smart materials capable of exhibiting large magnetic field induced strain (MFIS) when subjected to magnetomechanical loadings. Two distinct mechanisms are responsible for the induced strain: martensitic variant reorientation and phase transformation.
Jean M. Souza, Luciana Loureiro S. Monteiro, Marcelo A. Savi   +2 more
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Characterization of NiMnGa magnetic shape memory alloys

Journal of Materials Processing Technology, 2004
Abstract Magnetic shape memory (MSM) effect is a new invention in actuator materials field, allowing even 50 times greater strains than in previous magnetically controlled materials (magnetostrictive). In MSM materials the magnetic field moves microscopic parts of the material (so-called twins) that leads to a net shape change of the material.
G. Pirge, C.V. Hyatt, S. Altıntaş
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An Overview on Magnetic Shape Memory Alloys

2021
This chapter summarizes the development history and research status of magnetic shape memory alloys. The crystal structures are analyzed according to the phase diagram. Finally, the basic concept and properties related to martensitic transformation or twin boundary motion are introduced, including shape memory effect, superelasticity, magnetic-field ...
Xuexi Zhang, Mingfang Qian
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4D printing of Magnetic Shape Memory Alloys

2020
Magnetic shape memory alloys (MSMA) are ferromagnetic materials exhibiting a plastic reversible transformation when subjected to a magnetic field. This transformation occurs within few milliseconds, making them good candidates for ultra-fast actuators.
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Magnetic shape memory alloy composites

2014
Keywords: Magnetic shape memory alloys ; Polymer-matrix composites ; Mechanical properties ; Thermal properties ; Interfacial behaviour ; Damping ; Magnetic actuation ; Finite element modelling These Ecole polytechnique federale de Lausanne EPFL, n° 6334 (2014)Programme doctoral Sciences et Genie des materiauxFaculte des sciences et techniques de l ...
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Nonlinear Dynamic Characteristics of Magnetic Shape Memory Alloy Actuator

Applied Mechanics and Materials, 2015
A kind of hysteretic nonlinear model of magnetic shape memory alloy (MSMA) was developed in this paper, and the nonlinear dynamic characteristics of MSMA actuator were investigated. Van der Pol nonlinear item were introduced to interpret the hysteretic phenomena of strain-magnetic field intensity (MFI) curves of MSMA, and the constitutive relationship ...
Zhi-Wen Zhu, Xin-Miao Li, Jia Xu
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Magnetic properties of Mn₂NiSn shape memory alloy

Journal of Physics: Condensed Matter, 2013
In this paper, we present the magnetic properties of the inverse Heusler Mn2NiSn alloy computed by ab initio density functional theory (DFT) calculations in order to understand the large magnetic moments observed in experiments in contrast to smaller values obtained in previous ab initio calculations.
Souvik, Paul, Biplab, Sanyal, Subhradip, Ghosh   +2 more
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