Effect of Magnetic Fields on Athermal and Isothermal Martensitic Transformations in Fe&amp;ndash;Ni&amp;ndash;Mn Alloys

Kakeshita, Tomoyuki; Kuroiwa, Koichi; Shimizu, K.; Ikeda, T.; Yamagishi, A.; Date, Muneyuki

doi:10.2320/matertrans1989.34.415

Cited by 102 publications

(59 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…26) They also showed in an Fe-Ni-Mn alloy that with increasing field intensity the isothermal martensitic transformation exhibits athermal nature in a field stronger that a critical value. 27,28) This lends support to their view that both athermal and isothermal martensitic transformation can be treated in a unified manner.…”

Section: Martensitic Transformationsupporting

confidence: 51%

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

Enomoto

2005

Mater. Trans.

View full text Add to dashboard Cite

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.

show abstract

Section: Martensitic Transformationsupporting

confidence: 51%

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

Enomoto

2005

Mater. Trans.

View full text Add to dashboard Cite

show abstract

“…They calculated the increase in M s as a function of magnetic field strength using thermodynamics and obtained a good agreement with experimental data. The principle used in the calculation is shown in figure 2 [33], which is a schematic illustration of Gibbs free energy, G, as a function of temperature, T. The subscripts p, m and H denote parent phase, product phase (martensite in this case) and applied magnetic field, respectively. T o stands for the temperature at which the parent and product phases have the same free energy in the absence of an applied field.…”

Section: Gibbs Free Energy (G)mentioning

confidence: 99%

Structural control of Fe-based alloys through diffusional solid/solid phase transformations in a high magnetic field

Ohtsuka

2008

Science and Technology of Advanced Materials

View full text Add to dashboard Cite

A magnetic field has a remarkable influence on solid/solid phase transformations and it can be used to control the structure and function of materials during phase transformations. The effects of magnetic fields on diffusional solid/solid phase transformations, mainly from austenite to ferrite, in Fe-based alloys are reviewed. The effects of magnetic fields on the transformation temperature and phase diagram are explained thermodynamically, and the transformation behavior and transformed structures in magnetic fields are discussed.

show abstract

“…Such a gradual growth of the 0 -plate resembles that reported in an Fe-Ni-Mn alloy. 22) From the above results, we suggest that the upper part of the double C-curve should be related to the direct ! 0 martensitic transformation induced isothermally in the vicinity of grain boundary during the isothermal holding experiment.…”

Section: Morphologies Of Martensites Formed During Isothermal Holdingmentioning

confidence: 99%

Isothermal Martensitic Transformation in Sensitized SUS304 Austenitic Stainless Steel at Cryogenic Temperature

2009

View full text Add to dashboard Cite

We have investigated martensitic transformation behavior in a sensitized SUS304 austenitic stainless steel to know the stability of the austenitic phase at cryogenic temperatures. We found that the sensitized specimen exhibits an isothermal martensitic transformation when the specimen is held in the temperature range between 60 and 260 K. The time-temperature-transformation (TTT) diagram corresponding to the formation of 0.5 vol% of 0 -martensite shows a double-C curve with two noses located at about 100 and 200 K. An in-situ optical microscope observation has revealed that the double C-curve is due to two different transformation sequences. That is, the upper part of the C-curve is attributed to the direct (fcc) ! 0 (bcc) martensitic transformation and the lower part of the C-curve is due to the successive (fcc) ! " 0 (hcp) ! 0 (bcc) martensitic transformation. The direct ! 0 transformation occurs in the vicinity of grain boundaries, while the successive ! " 0 ! 0 transformation occurs near the center of each grain. The reason for appearing two types of isothermal transformation sequence in the sensitized SUS304 stainless steel will be due to the difference in concentration by sensitization heat-treatment.

show abstract

Effect of Magnetic Fields on Athermal and Isothermal Martensitic Transformations in Fe–Ni–Mn Alloys

Cited by 102 publications

References 12 publications

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

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

Structural control of Fe-based alloys through diffusional solid/solid phase transformations in a high magnetic field

Isothermal Martensitic Transformation in Sensitized SUS304 Austenitic Stainless Steel at Cryogenic Temperature

Contact Info

Product

Resources

About