Effect of Magnetic Field on Martensitic Transformation Temperature in Ni2MnGa with Single Variant and Multi-Variant States

2007 ◽  
pp. 3243-3248
Author(s):  
Takashi Fukuda ◽  
Jae Hoon Kim ◽  
Tomoyuki Kakeshita
Keyword(s):  
Magnetic Field ◽  
Martensitic Transformation ◽  
Transformation Temperature ◽  
Martensitic Transformation Temperature

Martensitic Transformation and Mechanical Properties of Fe-Doped Ni54Mn21Ga25 Alloys

2011 ◽  
Vol 687 ◽  
pp. 500-504
Author(s):  
S. X. Xue ◽  
S.S. Feng ◽  
P. Y. Cai ◽  
Q T Li ◽  
H. B. Wang
Keyword(s):  
Magnetic Field ◽  
Mechanical Properties ◽  
Magnetic Properties ◽  
Martensitic Transformation ◽  
Curie Temperature ◽  
Directional Solidification ◽  
Transformation Temperature ◽  
Room Temperature ◽  
Martensitic Transformation Temperature ◽  
Polycrystalline Alloys

Ni54Mn21-xFexGa25（x=0,1,3,5,7,9）polycrystalline alloys were prepared by the technique of directional solidification and the effect of substituting Fe for Mn on the martensitic transformation and mechanical properties of the alloys was analyzed. It was found that the Curie temperature increased with increasing substitution while the martensitic transformation temperature decreased. The Fe-doped Ni54Mn21Ga25 alloys exhibit excellent magnetic properties at room temperature; the typical Ni54Mn20Fe1Ga25 alloy shows a large magnetic-induced-strain of -1040 ppm at a magnetic field of 4000 Oe.

Magnetic field effect on the martensitic transformation temperature in Nb3Sn

Physica B+C ◽  
1985 ◽  
Vol 135 (1-3) ◽  
pp. 364-366 ◽  
Author(s):  
N. Toyota ◽  
T. Itoh ◽  
M. Kataoka ◽  
T. Fukase ◽  
H. Takei ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Martensitic Transformation ◽  
Transformation Temperature ◽  
Field Effect ◽  
Magnetic Field Effect ◽  
Martensitic Transformation Temperature

Phase Transformation in Fe-Based Alloys in High Magnetic Fields

2005 ◽  
Vol 475-479 ◽  
pp. 301-304 ◽  
Author(s):  
X.J. Hao ◽  
H. Ohtsuka
Keyword(s):  
Magnetic Field ◽  
Phase Transformation ◽  
Martensitic Transformation ◽  
Magnetic Fields ◽  
Maraging Steel ◽  
High Magnetic Field ◽  
Transformation Temperature ◽  
High Magnetic Fields ◽  
Martensitic Transformation Temperature ◽  
Pearlitic Transformation

The effects of a high magnetic field on phase transformation behaviors and microstructures in Fe-based alloys have been extensively studied. It was found that a magnetic field accelerates ferritic and martensitic transformation, changes the morphology of the transformed microstructures and increases the A3 and A1 temperature. In a magnetic field of 10 Tesla, the A1 temperature increases by about 15°C for Fe-0.8C, the A3 temperature for pure Fe increases by about 8°C and the martensitic transformation temperature Ms in 18Ni maraging steel increases by 20°C. Ferrite grains are elongated and aligned along the direction of magnetic field in Fe-0.4C and Fe-0.6C alloys by ferritic transformation, but elongation was not found in pure Fe, Fe-0.05C alloy and Fe-1.5Mn-0.11C-0.1V alloy. Aligned structure was not found either by pearlitic transformation in Fe-0.8C alloy or by cementite precipitation from martensite.

Magnetic Field-Induced Martensitic Transformation of Heusler-Type Ni2MnGa System

2007 ◽  
Vol 539-543 ◽  
pp. 3267-3272 ◽  
Author(s):  
Kazuko Inoue ◽  
Yasuo Yamaguchi ◽  
Yoshinobu Ishii ◽  
Hiroki Yamauchi ◽  
Toetsu Shishido
Keyword(s):  
Magnetic Field ◽  
Martensitic Transformation ◽  
Neutron Diffraction ◽  
Transformation Temperature ◽  
Field Effect ◽  
Room Temperature ◽  
Magnetic Field Effect ◽  
Martensitic Transformation Temperature ◽  
The Magnetic Field ◽  
Stoichiometric Alloy

Magnetic field effect on a Heusler-type Ni2MnGa off-stoichiometric alloy having a martensitic transformation temperature around room temperature which is coincident with a Curie temperature has been investigated. The process of martensitic transformation of a single crystal was investigated by neutron diffraction under the magnetic field up to 8 [T]. It was found that the magnetic field, which is applied at a temperature near the transformation temperature, causes the martensitic transformation. The process of the transformation caused by the increase in magnetic field is quite similar to the process caused by the decrease in temperature.

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