Comprehensive Testing Instrument on External Characteristics of Magnetically Controlled Shape Memory Alloy

Magnetically controlled shape memory alloy (MSMA) is widely concerned because of its superior characteristics in the field of functional materials. The application of MSMA materials base on experimental study, thus a comprehensive testing device of MSMA external characteristics is developed in this paper, which can simultaneously measure deformation, pressure, temperature and magnetic field. Experimental and testing device of the instrument are analyzed and designed. The curves between MSMA deformation rate and magnetic field, temperature are obtained with the testing device. The experimental results show the device can conveniently test the external characteristics of MSMA materials.

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Experimental Study on Temperature External-Characteristics of Ni-Mn-Ga Shape Memory Alloy

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.311-313.1232 ◽

2011 ◽

Vol 311-313 ◽

pp. 1232-1236 ◽

Cited By ~ 1

Author(s):

Yong Zhi Cai

Keyword(s):

Experimental Study ◽

Critical Temperature ◽

Shape Memory Alloy ◽

Shape Memory ◽

Temperature Effect ◽

Deformation Rate ◽

Variable Temperature ◽

Temperature Characteristics ◽

The Relationship ◽

External Characteristics

Temperature characteristics are essential to reasonable application of Ni-Mn-Ga alloy. This paper reports an experiment equipment which is used as the research of variable temperature effect. The relationship between deformation rate and temperature is studied. Dynamic and static experiments are done. The results show that critical temperature is around 40°C. It can be predicted that thermo-elasticity and magnetically-controlled characteristics will disappear with the increase of temperature.

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

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.446-447.230 ◽

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.

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Experimental Study of Tungsten Inert Gas Pulsed Welding Applied to Ni-Ti Shape Memory Alloy Wires

MRS Proceedings ◽

10.1557/opl.2015.822 ◽

2015 ◽

Vol 1765 ◽

pp. 153-158 ◽

Cited By ~ 1

Author(s):

Luiz F.A. Rodrigues ◽

Fernando A. Amorim ◽

Francisco F.R. Pereira ◽

Carlos J. de Araújo

Keyword(s):

Experimental Study ◽

Shape Memory Alloy ◽

Shape Memory Alloys ◽

Shape Memory ◽

Welding Process ◽

Functional Materials ◽

Inert Gas ◽

Scanning Calorimetry ◽

Dissimilar Joints ◽

Mechanical Cycling

ABSTRACTShape memory alloys are functional materials that can recover plastic strains between 2 and 6%. This property can be used to produce actuators for many areas as medicine, robotic, aeronautic and others. Recently, it has been observed the particular interest for shape memory alloys welding, especially to obtain Ni-Ti similar and dissimilar joints and fabricate simple or complex structures. In this sense, this work present an experimental study of tungsten inert gas pulsed welding applied to Ni-Ti shape memory alloy wires with 0.9 mm in diameter, previously heat treated at 450 °C for 20 minutes and air cooled. For that, it was carried out tensile tests at isothermal temperatures from 40 °C to 90 °C (steps of 10 °C) for welded and unwelded wires. The transformation temperatures obtained from differential scanning calorimetry were compared to verify the effect of welding process. It was also performed a stabilization process by mechanical cycling in some welded and unwelded Ni-Ti wires. The results showed a low strength and strain capacity of the weld joint at higher temperatures. Although, at lowest temperature, close to 40 °C, it was observed higher values of maximum stress and strain for welded Ni-Ti wires.

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Experimental Study on Reversibility of Magnetically Controlled Shape Memory Alloy

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.44-47.3100 ◽

2010 ◽

Vol 44-47 ◽

pp. 3100-3104 ◽

Cited By ~ 1

Author(s):

Ying Li Ding ◽

Yong Zhi Cai ◽

Cheng Wu Lin

Keyword(s):

Magnetic Field ◽

Experimental Study ◽

Martensitic Transformation ◽

Shape Memory Alloy ◽

Dynamic Response ◽

Shape Memory ◽

High Sensitivity ◽

Vibration Detection ◽

Dynamic Reversibility ◽

The Magnetic Field

This paper reports an experiment equipment which is used as reversibility research of magnetically controlled shape memory alloy (MSMA). The vibration detection is done based on dynamic reversibility of MSMA. The results show that MSMA will induce Martensitic transformation in the magnetic field. The characteristics of rapid dynamic response, high sensitivity and reversibility are found. The material is of a bright future of application in sensors and self-sensing actuator (SSA) field.

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