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Improved thermodynamic model for magnetic shape memory alloys
Smart Materials and Structures, 2012Magnetic shape memory alloys (MSMAs) are a class of materials that can exhibit up to 10% recoverable strain as a result of the application of either magnetic field or compressive stress. This unique property makes MSMAs potentially suitable for commercial applications such as sensors, power harvesters, or actuators.
Alex B Waldauer +3 more
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Behavior of Magnetic Shape Memory Alloys
2017The main advantage of magnetic shape memory alloys (MSMAs) over conventional shape memory alloys (SMAs) lies in the possibility for their actuation not only by stress or temperature but also by a magnetic field. This chapter is mainly devoted to the modeling of the thermo-magneto-mechanical behavior of single crystals under compressive loading ...
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Hysteretic Nonlinear Model of Magnetic Shape Memory Alloy
Applied Mechanics and Materials, 2011In this paper, a kind of Magnetic Shape Memory Alloy (MSMA) model based on hysteretic nonlinear theory was developed. Von del Pol nonlinear difference item was introduced to interpret the hysteresis phenomenon of strain-magnetic field intensity (MFI) curve of MSMA. The final relationship among strain, stress and magnetic field intensity was obtained in
Zhi Wen Zhu, Liang Gao, Jia Xu
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Neutron Diffraction Studies of Magnetic Shape Memory Alloys
Materials Science Forum, 2011The characteristics of neutron diffraction applied to the study of Ferromagnetic Shape Memory Alloys are revised. Main studies refer to crystal structure, preferential site occupancy, variant reorientation and magnetic moment distribution in the ...
José M. Barandiarán +3 more
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A Mechanism for Magnetically Driven Shape Memory Alloys
MRS Proceedings, 1999AbstractA mechanism for shape memory alloys driven by a magnetic field is proposed. The mechanism involves the motion of twin dislocations in response to the application of a magnetic field. As a consequence, twin variants oriented favorably with respect to the magnetic field direction will grow.
P. J. Ferreira, J. B. Vander Sande
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Additive manufacturing of magnetic shape memory alloys
Ni–Mn–Ga-based magnetic shape-memory alloys (MSMAs) are renowned for their large magnetic field–induced strains, making them attractive for compact magnetically controlled actuators requiring high response frequencies and large reversible deformations. This chapter aims to provide a structured framework for exploring the additive manufacturing (AM) of ...Ville Laitinen +2 more
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Damping Properties of Magnetically Ordered Shape Memory Alloys
Materials Science Forum, 2016Intermetallic alloys and compounds undergoing diffusionless solid–solid phase transformations are an important class of high-damping materials. Some representatives of these alloys and compounds also possess good magnetic properties. For such materials, a combination of the magnetoelastic coupling and a high mobility of the martensitic variants can ...
Vladimir V. Khovaylo +3 more
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Magnetic Compton Scattering Study of Shape Memory Alloys
Advanced Materials Research, 2008The Compton profile, projection of electron momentum density distribution along the scattering vector, is very sensitive to the behavior of valence electrons in a variety of materials. In this paper theoretical aspects related to measurement of spin momentum densities of magnetic materials using Compton scattering is reviewed.
B.L. Ahuja, Vinit Sharma, Y. Sakurai
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Magnetic Shape Memory Alloys with High Actuation Forces
2006Abstract : The specific aims of the project are: 1) Understand governing mechanisms and important physical, mechanical and magnetic parameters responsible for magnetic shape memory phenomena in MSMA alloys in single crystalline form, 2) to develop new nickel, iron or cobalt base ferromagnetic alloy compositions to increase attainable actuation stress ...
Dimitris C. Lagoudas, Ibrahim Karaman
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