Effect of Magnetic Field on &amp;gamma;&amp;rarr;&amp;alpha;&amp;prime; Martensitic Transformation and Magnetization of &amp;alpha;&amp;prime; and &amp;alpha;&amp;Prime; Iron-Nitrides

Koyano, Tomohiro; Ikeda, Hiroshi; Yoshizaki, Ryozo; Uehara, Kenichi; Tasaki, Akira; Ohtsuka, Hideyuki; Takamasu, T.; Wada, Hitoshi; Kido, G.; Ohba, Takayoshi

doi:10.2320/matertrans1989.41.923

Cited by 7 publications

(7 citation statements)

References 16 publications

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“…6,7). Therefore, isothermal magnetization measurements were carried out at temperatures above the Ms. Figure 2 shows magnetization of -FeN as a function of aging time for various magnetic fields at 231 K. Magnetization shows abrupt increase in initial stage, and gradually saturates.…”

Section: Resultsmentioning

confidence: 99%

“…0 martensitic transformation, and found magnetic field promotes this structural change. 6,7) With using static high magnetic field of 2:8 Â 10 7 A/m at 4.2 K, the amount of phase is reduced as low as 7%, 7) and the 0 phase is found to possess magnetization of 2:95 Â 10 À4 WbÁm/kg. 6) This means magnetization would grow up exceeding pure Fe if the remaining phase were eliminated.…”

Section: Introductionmentioning

confidence: 99%

“…6,7) With using static high magnetic field of 2:8 Â 10 7 A/m at 4.2 K, the amount of phase is reduced as low as 7%, 7) and the 0 phase is found to possess magnetization of 2:95 Â 10 À4 WbÁm/kg. 6) This means magnetization would grow up exceeding pure Fe if the remaining phase were eliminated. In order for this particular interest, it must be clarified what limits, and why magnetic field increases the f .…”

Section: Introductionmentioning

confidence: 99%

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Isothermal Martensitic Transformation of γ-FeN in a Magnetic Field

Koyano

2003

Mater. Trans.

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Isothermal martensitic transformation of the -FeN was found to occur in magnetic field at temperatures above the Ms. Molar fraction of martensite monotonically increases with increasing isothermal aging time, and saturates at a value proportional to applied magnetic field. Temperature and magnetic field dependence of the saturation value indicates that the transformation does not proceed above the temperature where the value become zero in a given magnetic field. Application of magnetic field reveals intrinsic isothermal character of the martensitic transformation in the -FeN hidden behind the complication associated with magnetization process of the 0 phase.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Isothermal Martensitic Transformation of γ-FeN in a Magnetic Field

Koyano

2003

Mater. Trans.

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“…[32][33][34] Koyano 35,36) studied the formation of 0 Fe 16 N 2 from Fe-N austenite in an attempt to fabricate a bulk single crystal of 0 Fe 16 N 2 . They observed that to 0 martensitic transformation occurred isothermally at liquid helium temperature, which was above M s in a field of less than 40 T. …”

Section: Martensitic Transformationmentioning

confidence: 99%

Enhanced Phenomena in Metals with Electric and Magnetic Fields: II Magnetic Fields

Enomoto

2005

Mater. Trans.

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Magnetic field effects were first noticed in texture formation in ferrous alloys more than half a century ago, when the available field intensity was an order of or less than one Tesla. With increasing availability of very intense magnetic fields of an order of ten Tesla, the potential of magnetic field as an additional controllable external parameter for microstructure control is widely recognized, not only in ferromagnetic, but also in non-ferromagnetic metals and alloys. As a companion paper to Part I on electric field effects the influence of magnetic fields on microstructure, morphology and kinetics of transformations in solid metallic materials are reviewed in Part II.

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“…00 phase, we then utilized heat-treatments. A previous paper 11) reported magnetic measurements on these samples and discussed the volume fractions of the 0 phase. In this paper, the volume fractions of the 0 , , 00 , and 0 phases were examined directly, using X-ray diffraction data measured at a synchrotron radiation facility.…”

Section: Introductionmentioning

confidence: 99%

X-ray Diffraction Studies of Fe-N Bulk-Processed in a Magnetic Field Using Synchrotron Radiation

et al. 2003

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The volume fractions of 00 phase Fe 16 N 2 in bulk samples were estimated using X-ray diffraction data. The SPring-8 synchrotron radiation facility was utilized for data collection. Samples were prepared in an NH 3 +H 2 atmosphere, and a magnetic field was applied to reduce the amount of remanent phase. Samples were then annealed for varying times (0.25-512 h). Rietveld analysis was applied to obtain the volume fractions of each phase generated in the samples. The results showed relatively small fractions of the 00 phase were present. The discrepancy between the present analyses and the results of Mössbauer measurements are also discussed.

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Effect of Magnetic Field on γ→α′ Martensitic Transformation and Magnetization of α′ and α″ Iron-Nitrides

Cited by 7 publications

References 16 publications

Isothermal Martensitic Transformation of γ-FeN in a Magnetic Field

Isothermal Martensitic Transformation of γ-FeN in a Magnetic Field

Enhanced Phenomena in Metals with Electric and Magnetic Fields: II Magnetic Fields

X-ray Diffraction Studies of Fe-N Bulk-Processed in a Magnetic Field Using Synchrotron Radiation

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Effect of Magnetic Field on &gamma;&rarr;&alpha;&prime; Martensitic Transformation and Magnetization of &alpha;&prime; and &alpha;&Prime; Iron-Nitrides

Cited by 7 publications

References 16 publications

Isothermal Martensitic Transformation of &gamma;-FeN in a Magnetic Field

Isothermal Martensitic Transformation of &gamma;-FeN in a Magnetic Field

Enhanced Phenomena in Metals with Electric and Magnetic Fields: II Magnetic Fields

X-ray Diffraction Studies of Fe-N Bulk-Processed in a Magnetic Field Using Synchrotron Radiation

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Effect of Magnetic Field on γ→α′ Martensitic Transformation and Magnetization of α′ and α″ Iron-Nitrides

Isothermal Martensitic Transformation of γ-FeN in a Magnetic Field

Isothermal Martensitic Transformation of γ-FeN in a Magnetic Field