Phase equilibria in the Fe-rich portion of the Fe–Ni–Si system

Ikeda, Osamu; Himuro, Y.; Ohnuma, Ikuo; Kainuma, Ryosuke; Ishida, K.

doi:10.1016/s0925-8388(97)00614-2

Cited by 37 publications

(31 citation statements)

References 7 publications

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“…In the austenite phase formed as a result of martensitic transformations, many ferrous alloys and steels which are ferromagnetic in the martensite phase display paramagnetic behavior as Shimizu and Kakeshita previously reported [11]. Noteworthy to mention here, for the magnetic characterization of the materials, Mössbauer spectroscopy is one of the most efficient and precise methods which enables the determination of some properties like the isomer shift values, the hyperfine magnetic field and the volume fraction of austenite and martensite phases [4,9,12].…”

Section: Introductionmentioning

confidence: 92%

“…The elements constituting the alloy is one of the important factors affecting the characteristics of martensitic transformation such as hardness of austenite, morphology of martensite, effect of shape memory and magnetic properties of alloys Hyperfine Interact (2016) 237:11 [4][5][6][7]. For instance, even a small amount of Si, Mo or Co addition changes the martensite morphology, magnetic properties and hardness of the alloy [4,6,8,9]. Additionally, increasing Si content causes the martensite morphology to change from lath to twinning martensite plate and the volume fraction of martensite decreases according to a previous study of Gungunes et al [4].…”

Section: Introductionmentioning

confidence: 99%

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Microstructure, hyperfine interaction and magnetic transition of Fe-25%Ni-5%Si-x%Co alloys

Güngüneş

2016

Hyperfine Interact

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Morphological and magnetic properties in Fe-25%Ni-5%Si-x%Co (x = 0, 10, 15) alloys are investigated. Scanning electron microscopy (SEM), Mössbauer spectroscopy and AC magnetic susceptibility measurements are used to determine the physical properties of alloys. The martensite morphology changed depending on the Co content. The Mössbauer study shows that the volume fraction and hyperfine field of martensite increases while isomer shift values decrease with increasing Co content. On the other hand; AC susceptibility results showed that; Co is an effective element which can be used to control both the magnetic transition and martensitic transformation temperatures.

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Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Microstructure, hyperfine interaction and magnetic transition of Fe-25%Ni-5%Si-x%Co alloys

Güngüneş

2016

Hyperfine Interact

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“…Phase equilibria of the Fe-rich portion [7] and martensitic transformation of the -y phase [8] in Fe-Ni-Si alloy have been studied by the present authors. Figure 1 shows the phase equilibria and Ms temperature of unaged specimens of Fe-25%Ni-Si alloy.…”

Section: Introductionmentioning

confidence: 96%

Effect of ausaging on the morphology of martensite in an Fe-25%Ni-7.5%Si alloy

et al. 2001

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Abstract. The martensitic transformations in an Fe-25%Ni-7.5%Si (mass%) alloy ausaged under various conditions were investigated by means of optical and transmission electron microscopy, differential scanning calorimetry, electrical resistivity-temperature measurements and hardness-testing. It was clarified that nanoscale particles of Y'-(Ni,Fe) 3 Si with Ll 2 structure were formed in the austenite matrix by ausaging between 400 and 600°C, while no precipitation occurred due to ausaging at 700°C. The Ms temperature was depressed by ausaging at 400 and 500°C, but hardly changed when the ausaging temperature was 600°C. It was observed that the morphology of martensite which was lenticular in unaged specimen changed to a mixture of lenticular and thin plate by ausaging at below 600°C.

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“…Nishiyama describes stabilization of austenite as such a transformation that occurs difficult from austenite to martensite and also classified the stabilization of austenite in three subclasses as chemical, thermal, and mechanical stabilization [4]. As well, there are considerable studies on austenite stabilization and martensite morphologies of Fe-based alloys [6][7][8][9][10][11][12][13]. Gungunes et al [6] examined the influence of thermal stabilization in an Fe-24.5%Ni-4.5%Si alloy.…”

Section: Introductionmentioning

confidence: 99%

Effect of Si on austenite stabilization, martensite morphology, and magnetic properties in Fe-26%Ni-x%Si alloys

Güngüneş

Yasar

Dikici

2011

Int J Miner Metall Mater

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The effect of Si on the austenite stabilization, martensite morphology, and magnetic properties in Fe-26%Ni-x%Si (x=3.5, 5, and 6) alloys have been studied by means of transmission electron microscopy (TEM) and Mössbauer spectroscopy techniques. TEM observations reveal that the martensite morphology is closely dependent on the Si content. The volume fraction changes of martensite and austenite phases, the hyperfine magnetic field, and isomer shift values have been determined by Mössbauer spectroscopy. The Mössbauer study reveals that the hyperfine magnetic field, the isomer shift values and the volume fraction of martensite decrease with increasing Si content.

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Phase equilibria in the Fe-rich portion of the Fe–Ni–Si system

Cited by 37 publications

References 7 publications

Microstructure, hyperfine interaction and magnetic transition of Fe-25%Ni-5%Si-x%Co alloys

Microstructure, hyperfine interaction and magnetic transition of Fe-25%Ni-5%Si-x%Co alloys

Effect of ausaging on the morphology of martensite in an Fe-25%Ni-7.5%Si alloy

Effect of Si on austenite stabilization, martensite morphology, and magnetic properties in Fe-26%Ni-x%Si alloys

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