Experimental Study on the Magnetic Characteristics of Magnetic Shape Memory Alloy Materials

2013 ◽  
Vol 446-447 ◽  
pp. 230-234
Author(s):  
Tao Li ◽  
She Liang Wang ◽  
Tao Yang ◽  
Guang Yuan Weng
Keyword(s):  
Magnetic Field ◽  
Experimental Study ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Constitutive Relations ◽  
Memory Function ◽  
Magnetic Characteristics ◽  
Magnetic Shape Memory ◽  
Magnetic Shape Memory Alloy ◽  
Magnetic Induction Intensity

With shape memory function of new smart material, the magnetic control properties of magnetic shape memory alloy could be used to fabricate intelligent actuators for vibration control of structures. In order to study its magnetic properties, this text selected Ni53Mn25Ga22 as the material for the research and development of actuator drive, And two MSMA test specimens were prepared for the experimental study under the coupled action of the temperature, preload pressure and magnetic field. The results showed that the strain of MSMA induced by magnetic field decreased with the increase of the preload pressure at constant magnetic field. The deformation performance was best when the magnetic induction intensity was about 0.5T. And the constitutive relations were fitted for the actuator production to lay the foundation for later.

Hysteretic Nonlinear Model of Magnetic Shape Memory Alloy

2011 ◽  
Vol 121-126 ◽  
pp. 191-195
Author(s):  
Zhi Wen Zhu ◽  
Liang Gao ◽  
Jia Xu
Keyword(s):  
Magnetic Field ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Field Intensity ◽  
Magnetic Field Intensity ◽  
Partial Least Square ◽  
Least Square ◽  
Hysteresis Phenomenon ◽  
Magnetic Shape Memory ◽  
Magnetic Shape Memory Alloy

In 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 partial least-square regression method to describe the variation of strain-MFI curve with stress. The result of forecast test shows that the model can describe the characteristics of MSMA in different stress well. The new MSMA model is easy to be analyzed in theory, which is helpful to application of MSMA in engineering fields.

Martensitic Transformation and Magnetic-Field-Induced Strain in Magnetic Shape Memory Alloy NiMnGa Melt-Spun Ribbon

2005 ◽  
Vol 475-479 ◽  
pp. 2009-2012 ◽  
Author(s):  
Shi Hai Guo ◽  
Yang Huan Zhang ◽  
Bai Yun Quan ◽  
Jian Liang Li ◽  
Xin Lin Wang
Keyword(s):  
Magnetic Field ◽  
Martensitic Transformation ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Internal Stress ◽  
Melt Spinning ◽  
Martensitic Transformation Temperature ◽  
Magnetic Shape Memory ◽  
Magnetic Shape Memory Alloy ◽  
Melt Spun

A non-stoichiometric polycrystalline Ni50Mn27Ga23 magnetic shape memory alloy was prepared by melt-spinning technology. The effects of melt-spinning on the martensitic transformation and magnetic-field-induced strain (MFIS) of the melt-spun ribbon were investigated. The experimental results show that the melt-spun ribbon undergoes the thermal-elastic martensitic transformation and exhibits the thermo-elastic shape memory effect. But the martensitic transformation temperature decreases and Curie temperature remains unchanged. A particular internal stress induced by melt-spinning made a texture structure in the melt-spun ribbon, which made the melt-spun ribbon obtain larger transition-induced strain and MFIS. The internal stress was released under cycling of magnetic field. This resulted in a decrease of MFIS of the melt-spun ribbon.

Time-Dependent Evolution of Martensitic Structure Caused by Magnetic Field in Ni2MnGa Magnetic Shape Memory Alloy

2001 ◽  
Vol 373-376 ◽  
pp. 357-360 ◽  
Author(s):  
Nadiya Glavatska ◽  
Valentin G. Gavriljuk ◽  
Ilya Glavatskyy ◽  
Outi Söderberg ◽  
Y. Ge ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Time Dependent ◽  
Martensitic Structure ◽  
Magnetic Shape Memory ◽  
Magnetic Shape Memory Alloy

Experimental Study on the Magnetic Properties of MSMA and the Function of MSMA Actuator of Reticulated Shell Structure

2013 ◽  
Vol 846-847 ◽  
pp. 539-542
Author(s):  
Jin Sheng He ◽  
Tao Yang ◽  
She Liang Wang ◽  
Guang Yuan Weng
Keyword(s):  
Magnetic Field ◽  
Shape Memory ◽  
Shell Structure ◽  
Coupling Effect ◽  
Memory Function ◽  
Magnetic Shape Memory ◽  
Magnetic Shape Memory Alloy ◽  
Reticulated Shell Structure ◽  
Strain Model ◽  
The Magnetic Field

With shape memory function of new smart material, the magnetic control properties of magnetic shape memory alloy could be used to fabricate intelligent actuators for vibration control of reticulated shell structure. The major performance parameters of the microstructure of the materials has been considered in the functional relationship between the magnetic field and strain model of traditional magnetic shape memory alloys (MSMA). But the magnetic field of MSMA do not considered, induced strain and pre-pressure, ambient temperature and other factors, which is a mutual restraint relationship and coupling. Selected Ni53Mn25Ga22, in this paper, as the material for the research on deformation under the action of temperature, magnetic field, pressure coupling effect, and according to the test data designed a MSMA actuator drive.

Influence of Biaxial Magnetic Field on Martensite Reorientation in Magnetic Shape Memory Alloy

2011 ◽  
Vol 261-263 ◽  
pp. 697-701
Author(s):  
Yu Ping Zhu
Keyword(s):  
Magnetic Field ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Driving Force ◽  
Magnetic Shape Memory ◽  
Single Crystal Specimen ◽  
Magnetic Shape Memory Alloy ◽  
Special Concern ◽  
Martensite Reorientation ◽  
Theoretical Results

Based on thermodynamics, a constitutive model for magnetic shape memory alloy (MSMA) is developed under biaxial magnetic field. Considering the driving force provided by Gibbs free energy and resistive force during martensite reorientation, a kinetic equation is got. Of special concern is the influence of biaxial magnetic field on martensite reorientation for a Ni2MnGa single-crystal specimen. The theoretical results are in agreement with experimental data. Some useful conclusions can be obtained.

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