Compression and Compression-Compression Cyclic Deformation Properties of Ferromagnetic Ni&lt;sub&gt;2&lt;/sub&gt;MnGa-Based Shape Memory Alloy

Kira, T.; Murata, Kinzo; Shimada, Terumasa; Jeong, Soon‐Jong; Inoue, Shozo; Koterazawa, Keiji; Inoue, Kohei

doi:10.4028/www.scientific.net/msf.426-432.2207

Cited by 10 publications

(15 citation statements)

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“…This process was repeated a few times and an alloy ingot in a cylinder shape of 9 mm diameter and 60 mm length was fabricated. Thus fabricated ingot was sectioned to five columns 9 mm high and they are named specimens D, E, F, G and H from the top to the bottom (In a previous report, 23) specimens made in a similar manner were named specimens A, B, and C). Primarily employed in the present study was specimen D, which was wire-electro-discharge machined into four rectangular-shaped compression specimens with dimensions of 2.7 mm Â 2.7 mm Â 9 mm.…”

Section: Methodsmentioning

confidence: 99%

“…It should be noted that Ni 2 MnGa cannot repeatedly be deformed many times, because austenite phase is somehow brittle. 23) No magnetic effect on triggering stress for stress-induced transformation in the present study can be explained as follows. According to our transformation temperature measurements, as shown in Table 1, the difference in transformation temperature between M s and T c is large.…”

Section: Magnetic Field Effectmentioning

confidence: 99%

“…Hence, only a few reports are available on mechanical properties and behavior of FSMAs even without magnetic field. 11,16,23) We have recently carried out compression tests of Fe-bearing Ni 2 MnGa alloys with a magnetic field at temperatures below M s and the effect of magnetic field on triggering stress for variant rearrangement have been reported. 14) In the present study, compression tests are also carried out for a ternary Ni-25 at%Mn-23 at%Ga alloy at temperatures above A f and below M f , with and without a magnetic field.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Magnetic Field on Deformation Properties in Ferromagnetic Ni<SUB>2</SUB>MnGa Shape Memory Alloy

et al. 2004

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Ferromagnetic shape memory alloy Ni-25 at%Mn-23 at%Ga prepared by melting in an electric furnace was investigated to study compression properties at various temperatures with and without magnetic field. The magnetic field is applied parallel to the compression axis at a temperature below martensite finish temperature and at a temperature above austenite finish temperature. Triggering stress necessary for rearrangement of martensite variants is reduced by 0:76$1:68 MPa (i.e., 2:5$5:5%) when a magnetic field of 0:4$0:6 T is applied to martensite state. The stress reduction is larger at a higher magnetic field. On the other hand, triggering stress for stress-induced martensite transformation is essentially unchanged under the same magnetic field applied to austenite state. This is due in part to very small changes in Gibbs free energy under magnetic field because of large temperature differences between M s and T c . and because of essentially no difference in magnetization between martensite and austenite phases.

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Section: Methodsmentioning

confidence: 99%

Section: Magnetic Field Effectmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Magnetic Field on Deformation Properties in Ferromagnetic Ni<SUB>2</SUB>MnGa Shape Memory Alloy

et al. 2004

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“…As a result the amount of giant strains in Ni-Mn-Ga can increased appreciably which they exhibit in response to the application of magnetic field. [5 -8] The magnetic shape memory effect or giant strain has been observed in FSMA, [7,9] which is due the redistribution of martensite twin variants developed by boundary motion driven by a magnetic field. The cooperative motion of twining dislocations in FSMA leads to the development of strain upto 9.4%.…”

Section: Introductionmentioning

confidence: 99%

Shape Memory Effect in Ferromagnetic Ni‐Mn‐Ga Alloy

Mahendran¹,

Puspanathan²

2006

Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-

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The martensitic magnetothermoelastic transformation induced by a magnetic field in FSMA has been studied. It has been observed that the shape memory effect is associated with the reversible magnetic field-induced martensite at higher temperatures. It has been noted that upon cooling from the high temperature austenite parent phase the ferromagnetic shape memory alloys exhibit transition from paramagnetism to ferromagnetism. The Ni-25Mn-25Ga (at%) shows the thermomechanical martensitic transformation. The micrograph shows the martensitic transformation of the alloy that strongly depends on the applied magnetic field. The mechanisms of the magnetic microstructure causes the martensite bands, which run diagonally from left to right in the micrograph, have been observed. It is proposed that the FSMAs are very promising candidates for biomedical applications as the new smart material.

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“…The MFIS occurs via reorientation of martensitic variants under an applied magnetic field. These type of alloys have exciting potential to be the novel materials for new device application because of their high energy density [4]. Hence, more attention has been shown to utilize these materials for practical applications [5,6].…”

Section: Introductionmentioning

confidence: 99%

Internal stress dependent structural transition in ferromagnetic Ni–Mn–Ga nanoparticles prepared by ball milling

Peruman

Mahendran

Seenithurai

et al. 2010

Journal of Physics and Chemistry of Solids

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Compression and Compression-Compression Cyclic Deformation Properties of Ferromagnetic Ni<sub>2</sub>MnGa-Based Shape Memory Alloy

Cited by 10 publications

References 0 publications

Effect of Magnetic Field on Deformation Properties in Ferromagnetic Ni<SUB>2</SUB>MnGa Shape Memory Alloy

Effect of Magnetic Field on Deformation Properties in Ferromagnetic Ni<SUB>2</SUB>MnGa Shape Memory Alloy

Shape Memory Effect in Ferromagnetic Ni‐Mn‐Ga Alloy

Internal stress dependent structural transition in ferromagnetic Ni–Mn–Ga nanoparticles prepared by ball milling

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